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4,4'-Diphenylmethane diisocyanate101-68-8

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CAS No.:

101-68-8

Grade:

Industrial Grade

Content:

99.5%

Port:

上海

Brand:

OORENT

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Price valid (until):

2026-07-16

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Description

Product Detail

4,4'-Diphenylmethane diisocyanate Basic information

Product Name:	4,4'-Diphenylmethane diisocyanate
Synonyms:	1,1’-methylenebis(4-isocyanato)-benzene;para,para’-diphenylmethanediisocyanate;para,para’-methylenebis(phenylisocyanate);Rubinate 44;Rubinate LF-168;rubinate44;METHYLENEBIS(P-PHENYL ISOCYANATE);METHYLENEDIPHENYL 4,4'-DIISOCYANATE
CAS:	101-68-8
MF:	C15H10N2O2
MW:	250.25
EINECS:	202-966-0
Product Categories:	Pyridines ,Halogenated Heterocycles;Diphenylmethanes (for High-Performance Polymer Research);Functional Materials;Reagent for High-Performance Polymer Research;Alphabetic;M;META - METH;MDI;1
Mol File:	101-68-8.mol

4,4'-Diphenylmethane diisocyanate Chemical Properties

Melting point	38-44 °C
Boiling point	392 °C
density	1.19
vapor pressure	0.066 hPa (20 °C)
refractive index	1.5906 (estimate)
Fp	196 °C
storage temp.	-20°C
solubility	2g/l (decomposition)
form	solid
color	White to Almost white
Specific Gravity	1.180
explosive limit	0.4%(V)
Water Solubility	decomposes
FreezingPoint	37℃
Sensitive	Moisture Sensitive/Lachrymatory
BRN	797662
Dielectric constant	10.0（Ambient）
Exposure limits	ACGIH:TLV-TWA 0.005 ppm (0.051 mg/m3) OSHA:PEL-Ceiling 0.02 ppm (0.2 mg/m3) NIOSH:REL-TWA 0.05 mg/m3; REL-Ceiling 0.2 mg/m3[10-min]
Stability:	Stable. Combustible. Incompatible with strong oxidizing agents. Reacts violently with alcohols.
InChI	1S/C15H10N2O2/c18-10-16-14-5-1-12(2-6-14)9-13-3-7-15(8-4-13)17-11-19/h1-8H,9H2
InChIKey	UPMLOUAZCHDJJD-UHFFFAOYSA-N
SMILES	O=C=Nc1ccc(Cc2ccc(cc2)N=C=O)cc1
CAS DataBase Reference	101-68-8(CAS DataBase Reference)
NIST Chemistry Reference	Benzene, 1,1'-methylenebis[4-isocyanato-(101-68-8)
IARC	3 (Vol. 19, Sup 7, 71) 1999
EPA Substance Registry System	4,4'-Methylenedi(phenyl isocyanate) (101-68-8)

Safety Information

Hazard Codes	Xn,T,C
Risk Statements	42/43-36/37/38-20-48/20-40
Safety Statements	45-36/37-23
RIDADR	2206
OEB	D
OEL	TWA: 0.05 mg/m3 (0.005 ppm), Ceiling: 0.2 mg/m3 (0.020 ppm) [10-minute]
WGK Germany	1
RTECS	NQ9350000
Autoignition Temperature	>600 °C
Hazard Note	Toxic/Corrosive/Lachrymatory/Moisture Sensitive
TSCA	TSCA listed
HazardClass	6.1
PackingGroup	II
HS Code	29291090
Storage Class	11 - Combustible Solids
Hazard Classifications	Acute Tox. 4 Inhalation Carc. 2 Eye Irrit. 2 Resp. Sens. 1 Skin Irrit. 2 Skin Sens. 1 STOT RE 2 Inhalation STOT SE 3
Hazardous Substances Data	101-68-8(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: > 5000 mg/kg LD50 dermal Rabbit > 9000 mg/kg
IDLH	75 mg/m3

MSDS Information

Provider	Language
1,1'-Methylenebis(4-isocyanatobenzene)	English
ACROS	English
ALFA	English

4,4'-Diphenylmethane diisocyanate Usage And Synthesis

Description	4,4'-Diphenylmethane-diisocyanate (MDI) is used in the manufacture of various polyurethane products - elastic and rigid foams, paints, lacquers, adhesives, binding agents, synthetics rubbers, and elastomeric fibers.
Chemical Properties	white to light yellow flakes or crystals
Chemical Properties	MDI is a white to light-yellow, odorless flakes. A liquid above 37C.
Uses	Diphenylmethane-4,4-diisocyanate (MDI)is widely used in the production ofrigid urethane foam products, coatings, andelastomers..
Uses	Diphenyl methane diisocyanate (MDI) is widely used in polyurethane coatings, this product is made of polyurethane foam used as a warm (cold), building materials, vehicle, ship parts; masterwork can made car Block, buffer, synthetic leather, non plastic polyurethane, polyurethane elastic fiber, no plastic elastic fibers, films, adhesives.
Uses	Diphenylmethane-4,4-diisocyanate is used in the preparation of polyurethane resin and Spandex fibers; bonding of rubber to rayon; diisoeyanate in the production of polyurethane lacquers, foam plastics, rubber, and glues.
Definition	ChEBI: A diisocyanate consisting of diphenylmethane with two isocyanate groups at the 4- and 4'-positions.
Preparation	Phosgene (800 g, 8 mol) (for a safe source) was dissolved in o-dichlorobenzene (2000 mL), and the resulting solution was cooled in an ice-salt bath. To the stirred solution, a hot solution of 4,4'-diaminodiphenylmethane (200 g, 1.01 mol) in o-dichlorobenzene (1000 mL) was slowly added through a heated dropping funnel. The rate of addition was regulated so that the temperature of the phosgene solution did not rise substantially above 0°C. The fine suspension that resulted was slowly heated and additional phosgene (700 g, 7.1 mol) was added at 130 °C until a clear solution appeared. After purging with carbon dioxide, the solvent was removed in vacuo and the product was purified by vacuum distillation. At 156–158 °C (0.1 mmHg), 215 g (0.85 mol, 84%) of 4,4’-diphenylmethane diisocyanate was obtained. Several procedures for the preparation of isocyanates with phosgene have been described. Nevertheless, many of them require the delivery of gaseous phosgene from an external source, such as a pressurized cylinder.
General Description	Diphenylmethane-4,4-diisocyanate is a light yellow colored solid. 4,4'-Diphenylmethane diisocyanate is not soluble in water. 4,4'-Diphenylmethane diisocyanate may be toxic by ingestion, inhalation, or skin absorption. If in a solution 4,4'-Diphenylmethane diisocyanate may or may not burn depending on the nature of the material and/or the solvent. It's used to make plastics.
Air & Water Reactions	4,4'-Diphenylmethane diisocyanate is not soluble in water.
Reactivity Profile	Isocyanates and thioisocyanates, such as 4,4'-Diphenylmethane diisocyanate, are incompatible with many classes of compounds, reacting exothermically to release toxic gases. Reactions with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizers, hydrides, phenols, and peroxides can cause vigorous releases of heat. Acids and bases initiate polymerization reactions in these materials. Some isocyanates react with water to form amines and liberate carbon dioxide. Base-catalysed reactions of isocyanates with alcohols should be carried out in inert solvents. Such reactions in the absence of solvents often occur with explosive violence, [Wischmeyer(1969)].
Health Hazard	Breathlessness, chest discomfort, and reduced pulmonary function.
Health Hazard	MDI can present a moderate to severe healthhazard, because of respiration of its vapors and particulates. It can contaminate the environment during foam application; concentrations in air were measured as high as5 mg/m³, mostly as particulates (ACGIH1986). The toxic route is primarily inhalation.The vapor pressure of this compound atambient temperature is very low, 0.00014torr at 25°C. However, when heated to about75°C, the acute health hazard is greatlyenhanced (Hadengue and Philbert 1983). Theacute toxic symptoms were found to besimilar to those of toluene-2,4-diisocyanateand other aromatic isocyanates. Inhalation ofits vapors or particulates can cause bronchitis, coughing, fever, and an asthma-likesyndrome. Other symptoms were nausea,shortness of breath, chest pain, insomnia,and irritation of the eyes, nose, and throat.The immunologic response, however, variedamong humans. Exposure to 0.1–0.2 ppmfor 30 minutes is likely to manifest the acutetoxic effects in humans. MDI is an eye and skin irritant. Contactwith skin can produce eczema. The acuteoral toxicity of this compound is very low,considerably lower than that of toluene-2,4-diisocyanate. The lethal dose for rats was31.7 g/kg. MDI showed positive in mutagenic testingon Salmonella typhimurium. There is noreport that indicates its carcinogenicity.
Fire Hazard	Noncombustible; flash point (open cup) 202°C (395°F). MDI reactions with strong oxidizers, acids, and bases can be vigorous.
Flammability and Explosibility	Non flammable
reaction suitability	reagent type: cross-linking reagent
Contact allergens	MDI is used in the manufacture of various polyurethane products: elastic and rigid foams, paints, lacquers, adhesives, binding agents, synthetic rubbers, and elastomeric fibers.
Safety Profile	Poison by inhalation. Mildly toxic by ingestion. Human systemic effects by inhalation: increased immune response and body temperature. A skin and eye irritant. An allergic sensitizer. Questionable carcinogen. Mutation data reported. A flammable liquid. When heated to decomposition it emits toxic fumes of NOx and SOx.
Potential Exposure	MDI is used in the production of polyurethane foams and plastics; polyurethane coatings; elastomers, and thermoplastic resins.
First aid	If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek med-ical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, includ-ing resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medi-cal attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit.Medical observation is recommended for 24- -48 h afterbreathing overexposure, as pulmonary edema may bedelayed. As first aid for pulmonary edema, a doctor orauthorized paramedic may consider administering a corticosteroid spray.
Environmental Fate	Due to its low vapor pressure (0.000 62 Pa at 20 ℃), MDI partitioning to the atmosphere is limited; and vapors are rapidly eliminated by reaction with hydroxyl radicals (22 h half-life). Degradation by either direct photolysis or hydrolysis by water vapor to methylenedianiline (MDA) does not play a significant role in the atmospheric fate of MDI. In water, the isocyanate group of MDI can be rapidly hydrolyzed to an amine (<1 min half-life) that in turn reacts at a much faster rate with another isocyanate group to yield urea. Because MDI has two isocyanate groups, these reactions lead to cross-linked polyureas, which are inert, insoluble solids. Unless MDI is well dispersed in water, these processes result in the formation of a solid polyurea crust that encases the unreacted material, restricts both water ingress and amine egress, and leads to higher yields of polyurea. Under stirred aqueous conditions, the fraction of 4,4'-MDI converted to 4,4'-MDA is less than 1%; unstirred, the fraction is 0.005%. MDI released to soil will not exhibit significant transport to other environmental media due to the favored reaction with water to form inert polyureas and binding to the soil biomass. As expected, pMDI and the waterinsoluble oligo- and polyureas that form when pMDI enters an aqueous environment showed no biodegradation over 28 days in a guideline study.
storage	Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Prior to working with thischemical you should be trained on its proper handling andstorage. Store at temperatures indicated on labels, separatelyfrom acids, bases, amines, alcohols and ammonia, and withventilation along the floor. Since MDI will react with moisture in the air, the storage area should be a dry place, awayfrom all sources of fire or ignition.
Shipping	UN2811 Toxic solids, organic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required
Toxicity evaluation	The primary health concern with exposure to MDI is dermal and respiratory sensitization. Both are initiated by conjugation of MDI isocyanate groups with macromolecules at the point of contact, which forms a hapten that subsequently activates immunologic processes resulting in sensitization. Data in animals indicate dermal contact with MDI can lead to respiratory sensitization. However, the human relevance of these observations is unclear since there are no validated animal models that accurately reflect the respiratory sensitization process and responses seen in humans. The low incidence of pulmonary tumors observed in chronic inhalation studies at maximum tolerated concentrations of pMDI is most likely the result of nongenotoxic cell proliferation associated with chronic inflammation and/or hyperplasia rather than a direct effect on DNA.
Incompatibilities	May form explosive mixture with air. Isocyanates are highly flammable and reactive with many compounds, even with themselves. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Reaction with moist air, water or alcohols may form amines and insoluble polyureas and react exothermically, releasing toxic, corrosive or flammable gases, including carbon dioxide; and, at the same time, may generate a violent release of heat increasing the concentration of fumes in the air. Incompatible with amines, aldehydes, alkali metals, ammonia, carboxylic acids, caprolactum, alkaline materials, glycols, ketones, mercaptans, hydrides, organotin catalysts, phenols, strong acids, strong bases, strong reducing agents such as hydrides, urethanes, ureas. Elevated temperatures or contact with acids, bases, tertiary amines, and acylchlorides may cause explosive polymerization. Attacks some plastics, rubber and coatings. May accumulate static electrical charges, and may cause ignition of its vapors. Unstable above 100F/38C. Polymerizes at temperatures above 204C. Contact with metals may evolve flammable hydrogen gas.
Toxics Screening Level	The initial threshold screening level (ITSL) for methylene diphenyl diisocyanate is 0.6 μg/m3 based on an annual averaging time.
Waste Disposal	Controlled incineration (oxides of nitrogen are removed from the effluent gas by scrubbers and/or thermal devices).

4,4'-Diphenylmethane diisocyanate Preparation Products And Raw materials

Raw materials	Sodium hydroxide-->Nitric acid-->Chlorine-->Formaldehyde-->Aniline-->CARBON MONOXIDE
Preparation Products	Polyurethane-->TRIPHENYLTIN HYDRIDE-->2-BIPHENYLYL ISOCYANATE

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Basic Info

Product Name:

Diphenylmethane diisocyanate

Other Name:

Benzene,1,1′-methylenebis[4-isocyanato-;Isocyanic acid,methylenedi-p-phenylene ester;1,1′-Methylenebis[4-isocyanatobenzene];Bis(4-isocyanatophenyl)methane;Diphenylmethane 4,4′-diisocyanate;Methylenebis(4-isocyanatobenzene);Bis(p-isocyanatophenyl)methane;p,p′-Methylenebis(phenyl isocyanate);4,4′-Methylenebis(phenyl isocyanate);Methylenebis(4-phenyl isocyanate);Diphenylmethylene 4,4′-diisocyanate;Methylenedi-p-phenylene diisocyanate;Methylenedi-p-phenylene isocyanate;4,4′-Methylenediphenyl diisocyanate;4,4′-Diisocyanatodiphenylmethane;Methylenebis(p-phenylene isocyanate);Methylbis(4-phenylisocyanate);4,4′-Methylenediphenylene isocyanate;Methylenebis(4-phenylene isocyanate);Methylenebis(p-phenyl isocyanate);Bis(1,4-isocyanatophenyl)methane;MDI;Methylenebis-p-phenylene diisocyanate;Methyldi-p-phenylene isocyanate;4,4′-Diphenylmethane diisocyanate;p,p′-Diphenylmethane diisocyanate;4,4′-Methylenedi-p-phenylene diisocyanate;Diisocyanatodiphenylmethane;Methylenebis(phenyl isocyanate);Diphenylmethane diisocyanate;Di(4-isocyanatophenyl)methane;4,4′-Methylenebis(isocyanatobenzene);Methylenebisphenylene diisocyanate;4,4′-MDI;Isocyanic acid,diphenylmethylene ester;Diphenylmethylene diisocyanate;4,4′-Methylenedi(phenyl isocyanate);4,4′-Bis(isocyanatophenyl)methane;Methylene diphenyl diisocyanate;NSC 9596;Diphenylmethyl diisocyanate;Methylene diisocyanate;Bis(isocyanatophenyl)methane;53633-14-0;55157-41-0;57460-66-9;77090-48-3;88001-94-9;97568-33-7;142690-07-1;153986-89-1;201528-77-0;1211266-59-9;1211316-64-1;1220313-65-4;1400594-70-8;1533423-48-1;1588489-56-8;2031250-39-0;2056146-02-0

CAS No.:

101-68-8

Molecular Formula:

C15H10N2O2

InChIKeys:

InChIKey=UPMLOUAZCHDJJD-UHFFFAOYSA-N

Molecular Weight:

250.25200

Exact Mass:

250.25

EC Number:

202-966-0

HScode:

29291090

Categories:

Polymer

Characteristics

PSA:

58.86000

XLogP3:

3.21200

Appearance:

Diphenylmethane-4,4-diisocyanate is a light yellow colored solid. It is not soluble in water. It may be toxic by ingestion, inhalation, or skin absorption. If in a solution it may or may not burn depending on the nature of the material and/or the solvent. It is used to make plastics.

Density:

1.197 g/cm³ @ Temp: 70 °C

Melting Point:

37 °C

Boiling Point:

196 °C @ Press: 5 Torr

Flash Point:

196ºC

Refractive Index:

1.5906 (50ºC)

Water Solubility:

Decomposes in water

Storage Conditions:

Refrigerator

Vapor Pressure:

9.02E-06mmHg at 25°C

Vapor Density:

Relative vapour density (air = 1): 8.6

Flammability characteristics:

Combustible Solid

Odor:

Odorless

See More Diphenylmethane diisocyanate Properties 

Hazard Identification

Classification of the substance or mixture

Skin irritation, Category 2

Eye irritation, Category 2

Skin sensitization, Category 1

Acute toxicity - Category 4, Inhalation

Specific target organ toxicity â single exposure, Category 3

Respiratory sensitization, Category 1

Carcinogenicity, Category 2

Specific target organ toxicity â repeated exposure, Category 2

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Danger
Hazard statement(s)	H315 Causes skin irritation H319 Causes serious eye irritation H317 May cause an allergic skin reaction H332 Harmful if inhaled H335 May cause respiratory irritation H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled H351 Suspected of causing cancer H373 May cause damage to organs through prolonged or repeated exposure
Prevention	P264 Wash ... thoroughly after handling. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/... P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P272 Contaminated work clothing should not be allowed out of the workplace. P271 Use only outdoors or in a well-ventilated area. P284 [In case of inadequate ventilation] wear respiratory protection. P203 Obtain, read and follow all safety instructions before use. P260 Do not breathe dust/fume/gas/mist/vapours/spray.
Response	P302+P352 IF ON SKIN: Wash with plenty of water/... P321 Specific treatment (see ... on this label). P332+P317 If skin irritation occurs: Get medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P333+P317 If skin irritation or rash occurs: Get medical help. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P317 Get medical help. P319 Get medical help if you feel unwell. P342+P316 If experiencing respiratory symptoms: Get emergency medical help immediately. P318 IF exposed or concerned, get medical advice.
Storage	P403+P233 Store in a well-ventilated place. Keep container tightly closed. P405 Store locked up.
Disposal	P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

NO open flames. Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Separated from food and feedstuffs and incompatible materials. See Chemical Dangers. Cool. Dry. Keep in the dark.Isocyanates are transported in railroad tank cars, tank trucks, tanks in ships, containers, and drums. They are stored in steel tanks and processed in steel equipment. For long-term storage stainless steel is recommended. To avoid contamination by atmospheric moisture, a dry air or inert gas blanket is essential. Isocyanates

See More Diphenylmethane diisocyanate Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
pharmaceutical intermediates,peptides,electronic chemicals

Location:
Room 102, 1st Floor, East Office Building, No. 45 Pengwan Road, Qianwan Bonded Port Area, Qingdao Zone, China (Shandong) Pilot Free Trade Zone

Payment Terms:
100% TT in advance

Average lead Time:
10

Total Annual Revenue:
$10 million-$25 million

Total Employees:
51-100

Year of Establishment:
2024

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We are mainly specilized in supply of pharmaceutical intermediates, electronic chemicals，food additives, and other fine chemical products.
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Website: orientchem.cc
Email: scarlett@orientchem.cc
WhatsApp: +86 17753254221

Inquiry History

25 Inquiries

Country	Product	Purchase Quantity	Date Posted
United Arab Emirates	(MDI) Methylene Diphenyl Diisocyanate	1.00 KG	Mar 5, 2026
Qatar	4’-diphenylmethane diisocyanate	10.00 KG	Sep 15, 2025
Mexico	Monomeric Methylene diphenyl Diisocyanate	20000 KG	May 16, 2025
United Arab Emirates	Methylene Diphenyl Diisocyanate	2.00 20' Fcl	Dec 30, 2024
India	4,4 MDI (Equivalent to Lupranate MI and Desmodur 2460)	1000.00 KG	Dec 6, 2024
Poland	Methylene diphenyl diisocyanate	250.00 KG	May 15, 2026
United Arab Emirates	(MDI) Methylene Diphenyl Diisocyanate	1.00 KG	Apr 16, 2026
United Arab Emirates	Methylene Diphenyl Diisocyanate	1.00 40' Fcl	Aug 20, 2025
India	Diphenyl Methane-4,4'-Diisocyanate (MDI)	250 MT	Jul 31, 2025
Saudi Arabia	Methylene Diphenyl Diisocyanate	1.00 20' Fcl	Dec 31, 2024
Saudi Arabia	Methylene Diphenyl Diisocyanate	1.00 20' Fcl	Dec 24, 2024
Oman	MDI PM 200	24 MT	Jul 29, 2024
Russia	PMDI	1 20' Fcl	Jul 15, 2024
India	moka business pvt ltd	10 MT	Nov 27, 2023
United Arab Emirates	Methylene diphenyl diisocyanate	50 MT	Aug 3, 2023
United Arab Emirates	(MDI) Methylene Diphenyl Diisocyanate	1.00 KG	Jun 2, 2026
India	Methylene diphenyl diisocyanate	5.00 20' Fcl	Mar 3, 2026
India	methylene bis(4-phenylisocyanate)	500 G	Jul 21, 2025
Saudi Arabia	Methylene diphenyl diisocyanate	1.00 20' Fcl	Apr 23, 2025
India	MDI	27 MT	Mar 4, 2025

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4,4'-Diphenylmethane diisocyanate101-68-8

Product Description

Seller Information

Inquiry History

Classification of the substance or mixture

GHS label elements, including precautionary statements

Other hazards which do not result in classification

Precautions for safe handling

Conditions for safe storage, including any incompatibilities

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