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Chlorotrimethylsilane75-77-4

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CAS No.:

75-77-4

Grade:

Industrial Grade

Content:

99.5%

Port:

上海

Brand:

OORENT

Packaging:

Vial/Bottle/Bag/Carton

Price valid (until):

2026-07-17

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Qingdao Orient Chemical Co.,LTD

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Product Detail

Chlorotrimethylsilane Basic information

Product Name:	Chlorotrimethylsilane
Synonyms:	(CH3)3SiCl;DOW CORNING(R) PRODUCT Z-1224;CHLOROTRIMETHYLSILANE;SILANE M3;TMCS;TMSCL;TRIMETHYLSILYL CHLORIDE;TRIMETHYL SILICON CHLORIDE
CAS:	75-77-4
MF:	C3H9ClSi
MW:	108.64
EINECS:	200-900-5
Product Categories:	Silicone Series;Silylation Reagents;Organics;Analytical Chemistry;Biochemistry;GC Derivatizing Reagents;Monochlorosilanes;Nucleosides, Nucleotides & Related Reagents;Protecting Agents for Hydroxyl and Amino Groups;Protecting Agents, Phosphorylating Agents & Condensing Agents;Protection & Derivatization Reagents (for Synthesis);Reagents for Oligosaccharide Synthesis;Si (Classes of Silicon Compounds);Si-Cl Compounds;Pharmaceutical Intermediates;Chloro;Silicon Compounds (for Synthesis);Silylation (GC Derivatizing Reagents);Synthetic Organic Chemistry;Trimethylsilylation (GC Derivatizing Reagents);Blocking Agents;Chloro Silanes;Protective Agents;Silylating Agents;organosilicon compounds;bc0001;TOP2
Mol File:	75-77-4.mol

Chlorotrimethylsilane Chemical Properties

Melting point	−40 °C(lit.)
Boiling point	57 °C(lit.)
density	0.857 g/mL at 25 °C
vapor density	3.7 (vs air)
vapor pressure	100 mm Hg ( 25 °C)
refractive index	n20/D 1.500
Fp	104 °F
storage temp.	Store below +30°C.
solubility	Miscible with ether, benzene, diethylether and perchloroethylene.
form	Liquid
Specific Gravity	0.8536 (27℃)
color	Clear colorless
explosive limit	1.5-46%(V)
Water Solubility	REACTS
Sensitive	Moisture Sensitive
Hydrolytic Sensitivity	8: reacts rapidly with moisture, water, protic solvents
BRN	1209232
Stability:	Stable. Highly flammable - note low flash point. Reacts violently with water. Incompatible with water, moisture, strong oxidizing agents, strong acids, strong bases, aldehydes, alcohols, amines, esters, ketones.
InChI	1S/C3H9ClSi/c1-5(2,3)4/h1-3H3
InChIKey	IJOOHPMOJXWVHK-UHFFFAOYSA-N
SMILES	C[Si](C)(C)Cl
CAS DataBase Reference	75-77-4(CAS DataBase Reference)
NIST Chemistry Reference	Silane, chlorotrimethyl-(75-77-4)
EPA Substance Registry System	Trimethylchlorosilane (75-77-4)

Safety Information

Hazard Codes	T,F,C,Xn
Risk Statements	20/21-36/38-34-21-14-11-37-35-19-40-10-67-20/21/22-52
Safety Statements	26-36/37/39-45-16-36/37-7/9
RIDADR	UN 1298
WGK Germany	2
RTECS	VV2710000
F	10-21
Autoignition Temperature	752 °F
Hazard Note	Highly Flammable/Corrosive/Moisture Sensitive
TSCA	TSCA listed
HazardClass	3
PackingGroup	II
HS Code	29310095
Storage Class	3 - Flammable liquids
Hazard Classifications	Acute Tox. 3 Inhalation Acute Tox. 3 Oral Acute Tox. 4 Dermal Eye Dam. 1 Flam. Liq. 2 Skin Corr. 1A
Hazardous Substances Data	75-77-4(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: 4868 mg/kg LD50 dermal Rabbit 1530 mg/kg

MSDS Information

Provider	Language
Chlorotrimethylsilane	English
ACROS	English
SigmaAldrich	English
ALFA	English

Chlorotrimethylsilane Usage And Synthesis

Description	Chlorotrimethylsilane is a valuable reagent for the protection of the hydroxyl function in organic synthesis. It should be distilled from calciumhydride (or tributylamine) under nitrogen before use,and stored and weighed under nitrogen. Use of the reagent without purification has been reported to lead to explosions. Chlorotrimethylsilane may contain dichlorodimethylsilane as an impurity. This may be removed before distillation by very cautious treatment with a small amount of water，which hydrolyses the dichloro compound more rapidly. Excess chlorotrimethylsilane in a reaction mixture may be destroyed by the very careful addition of aqueous sodium hydrogencarbonate solution.
Chemical Properties	Trimethylchlorosilane is a colorless fuming liquid with a pungent odor. Readily hydrolyzed with liberation of hydrogen chloride; soluble in benzene, ether and perchloroethylene. Chlorotrimethylsilane is a chloro-organosilane compound mainly used for silylation reactions.
Uses	Chlorotrimethylsilane is a typical Silane Blocking Agent, which can protect or deprotect functional groups selectively. It have been used in the preparation of volatile derivatives of a wide range of compounds for GC analysis, and used for silylation and as a protection group in the process of various organic synthesis. It is used in the production of trimethylsilyl halides, pseudohalides and various organic silicon compounds. It is also used to produce hexamethyldisilane by reduction.
Application	Trimethylsilyl chloride(TMCS) is the most extensively used derivatization reagent for gas chromatography.The reactions are generally performed under anhydrous conditions although reactions can be performed on samples obtained from water-containing samples.There are considerable opportunities for artifacts stemming from a variety of reasons including off-target reactions with aldehydes and ketones.The rate of reaction of TMCS with nucleophilic targets is comparatively slow compared to other alkylsilyl chlorides and requires the presence of a base catalyst such as pyridine.TMCS is included as a catalyst with other trialkylsilyl reagent such N,O-bis- (trimethylsilyl)trifluroacetamide (BSA) or N-methyl-N-(trimethylsilyl)trifluoroacetamide (MSTFA).The order of functional group reactivity is alcohols>phenols>carboxylic acids>amines>amides.
Reactions	Related to the epoxide ring opening, TMSCl also mediates some cyclopropane ring opening reactions. For example, treatment of 1-aceto-2,2-dimethylcyclopropane with TMSCl and sodium chloride in acetonitrile at 55°C for 24 h generated 5-chloro-5-methyl-2-hexanone in 84% yield (eq 39).When sodium iodide was employed to replace sodium chloride, iodotrimethylsilane generated in situ, and the reaction completed under more facile conditions (rt and 12 h). Interestingly, the dominant product is 5-iodo-4,4-dimethyl-2-pentanone (eq 40), arising from iodide attacking at the less hindered secondary methylene carbon, instead of the quaternary dimethylmethylene carbon.
Definition	ChEBI: Chlorotrimethylsilane is a silyl chloride consisting of a central silicon atom covalently bound to one chloro and three methyl groups. Chlorotrimethylsilane is a derivatisation agent used in gas chromatography/mass spectrometry applications. It has a role as a chromatographic reagent.
General Description	Trimethylchlorosilane appears as a colorless fuming liquid with a pungent odor. Boiling point 135° F, Flash point -18°F. Density 0.854g/cm3. The vapor and liquid may cause burns. Vapors are heavier than air.
Reactivity Profile	Chlorotrimethylsilane reacts vigorously and exothermically with water to produce hydrogen chloride.
Health Hazard	Similar to other silanes. Toxicity is rated high for inhalation, ingestion and local irritation. May cause death or permanent injury after a very short exposure to small quantities.
Fire Hazard	Violent reaction with water. Toxic and irritating hydrogen chloride and phosgene may be formed in fires. Difficult to extinguish, re-ignition may occur. Flashback along vapor trail may occur. Containers may explode in fire. Vapor may explode if ignited in enclosed area. When heated to decomposition or on contact with acids or acid fumes, chloride fumes are emitted. Reacts with surface moisture, releasing hydrogen chloride, which will corrode common metals and form flammable hydrogen gas. Avoid contact with water; Chlorotrimethylsilane readily hydrolyzes, liberating hydrochloric acid. Hazardous polymerization may not occur.
reaction suitability	reagent type: derivatization reagent reaction type: Silylations
Safety Profile	Poison by ingestion and skin contact. Moderately toxic by inhalation and intraperitoneal routes. A corrosive irritant to skin, eyes, and mucous membranes. Questionable carcinogen with experimental neoplastigenic data. Mutation data reported. A flammable liquid and very dangerous fire hazard when exposed to heat or flame. Violent reaction with water or hexafluoroisopropylideneamino lithium, A preparative hazard. To fight fire, use foam, alcohol foam, fog. When heated to decomposition it emits toxic fumes of Cl-. An intermediate in the production of silicones. See also CHLOROSILASES.
Synthesis	Add 20 ml of dichloromethane, 20 ml of hexamethyldisiloxane, 12.5 g of BTC and 0.2 g of tetrabutylammonium bromide to a reaction flask with a reflux condenser, and dissolve with stirring; lower the temperature to 0~10 , add 8 ml of MDMF dropwise to the reaction flask for 20 min; warm up the temperature to 322 , and the reaction was carried out for 17 h. GC detected that the conversion rate of the hexamethyldisiloxane was >99%; convert the The reflux condenser was changed to a distillation column and distilled under reduced pressure at 30~35C to obtain ~20 ml of dichloromethane and 23.3 ml of trimethylchlorosilane; the content of trimethylchlorosilane was 99.5% by GC.
Potential Exposure	Trimethylchlorosilane is used as an intermediate to make silicone products, including lubricants
Shipping	UN1298 Trimethylchlorosilane, Hazard Class: 3; Labels: 3-Flammable liquid, 8-Corrosive material.
Purification Methods	Likely impurities are other chlorinated methylsilanes and tetrachlorosilane (b 57.6o), some of which can form azeotropes. To avoid the latter, very efficient fractional distillation is required. It has been fractionated through a 12 plate glass helices-packed column with only the heart-cut material being used. It has also been fractionated through a 90cm, 19mm diameter Stedman column (p 11). Purify it by redistilling from CaH2 before use. [Sauer et al. J Am Chem Soc 70, 4254 1948, Sauer & Hadsell J Am Chem Soc 70 4258 1948, Langer et al. J Org Chem 23 50 1958, Beilstein 4 IV 4007.] FLAMMABLE and CORROSIVE.
Incompatibilities	Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Chlorosilanes react vigorously with bases and both organic and inorganic acids generating toxic and/or flammable gases. Chlorosilanes react with water, moist air, or steam to produce heat and toxic, corrosive fumes of hydrogen chloride. They may also produce flammable gaseous hydrogen. Attacks metals in the presence of moisture. Vigorous reaction with aluminum powder.
Toxics Screening Level	The ITSL for TRIMETHYLCHLOROSILANE has been set at 6. 3 μg/m3 based on annual average time.
Waste Disposal	Do not discharge into drains or sewers. Use a licensed disposal contractor to an approved landfill. Must be disposed properly by following package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office for guidance on acceptable disposal practices. The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational exposure or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material’s impact on air quality; potential migration in soil or water; effects on animal, aquatic, and plant life; and conformance with environmental and public health regulations.

Chlorotrimethylsilane Preparation Products And Raw materials

Raw materials

Acetyl chloride-->Copper(I) chloride-->Chloromethane-->Silicon-->Chloromethyl silane-->Tetramethylsilane

Preparation Products

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-phenylacetic acid-->5-Fluoro-2-picolinic acid-->(Trifluoromethyl)trimethylsilane-->Hexamethyldisilazane-->Thiophene-2-ethylamine-->Rhodanine-3-acetic acid-->Pyridine sulfur trioxide-->6-IODO-PYRIDINE-2-CARBOXYLIC ACID-->Cefoperazone-->1-METHOXY-3-TRIMETHYLSILOXY-1,3-BUTADIENE-->Trimethylsilylacetylene-->(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid-->4-AMINO-2,6-DIFLUORO-BENZALDEHYDE-->Hexamethyldisiloxane-->2,4-DIMETHOXYPHENETHYLAMINE-->5-BROMO-3-FLUORO-2-PYRIDINONE-->5-BROMO-3-CHLORO-2-PYRIDINONE-->Aniracetam-->TRIS(TRIMETHYLSILYL)SILANE-->Thiazole-4-carboxaldehyde-->6-CYANONICOTINIC ACID-->ROKITAMYCIN-->2-(TRIMETHYLSILYL)PHENYL TRIFLUOROMETHANESULFONATE-->7-Aminocephalosporanic acid-->Bis(trimethylsilyl)acetylene-->2,4-DIMETHYLQUINOLINE-3-CARBOXYLIC ACID-->Azidotrimethylsilane-->4'-Iodoacetophenone-->Ethoxytrimethylsilane-->2-ETHYL-4-METHYLQUINOLINE-3-CARBOXYLIC ACID-->BIS(TRIMETHYLSILYL)PEROXIDE-->ETHYL 2,4-DIMETHYLQUINOLINE-3-CARBOXYLATE-->ETHYL 2-(CHLOROMETHYL)-4-PHENYLQUINOLINE-3-CARBOXYLATE-->ETHYL 2-(CHLOROMETHYL)-4-PHENYLQUINOLINE-3-CARBOXYLATE HYDROCHLORIDE-->Tegafur-->1-(2,4-DIMETHYLQUINOLIN-3-YL)ETHANONE HYDROCHLORIDE-->ETHYL 2-(CHLOROMETHYL)-4-METHYLQUINOLINE-3-CARBOXYLATE HYDROCHLORIDE-->METHYL 2-(CHLOROMETHYL)-4-METHYLQUINOLINE-3-CARBOXYLATE HYDROCHLORIDE-->N,O-Bis(trimethylsilyl)acetamide-->Allyltrimethylsilane

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Basic Info

Product Name:

Chlorotrimethylsilane

Other Name:

Silane,chlorotrimethyl-;Chlorotrimethylsilane;Trimethylchlorosilane;Trimethylsilyl chloride;Trimethylsilicon chloride;Monochlorotrimethylsilicon;Trimethylsilane chloride;TSL 8031;Monochlorotrimethylsilane;KA 31;KA 31 (silane);NSC 15750;TMCS;LS 260;TMSCl;127290-36-2;36642-33-8

CAS No.:

75-77-4

Molecular Formula:

C3H9ClSi

InChIKeys:

InChIKey=IJOOHPMOJXWVHK-UHFFFAOYSA-N

Molecular Weight:

108.64200

Exact Mass:

108.64

EC Number:

200-900-5

UNII:

62UO4690X6

ICSC Number:

0966

NSC Number:

15750

UN Number:

1298

DSSTox ID:

DTXSID2024822

Color/Form:

Colorless liquid

HScode:

29310095

Categories:

Analysis Reagents

Characteristics

PSA:

XLogP3:

2.06010

Appearance:

Trimethylchlorosilane appears as a colorless fuming liquid with a pungent odor. Boiling point 135° F, Flash point -18°F. Density 0.854 g / cm3. The vapor and liquid may cause burns. Vapors are heavier than air.

Density:

0.854 g/cm³ @ Temp: 25 °C

Melting Point:

-57.7 °C

Boiling Point:

57 °C

Flash Point:

-18ºC

Refractive Index:

1.387-1.389

Water Solubility:

Solubility in water: reaction

Storage Conditions:

Store at RT.

Vapor Pressure:

100 mm Hg ( 25 °C)

Vapor Density:

3.7 (vs air)

Toxicity:

LD50 orally in Rabbit: 4868 mg/kg LD50 dermal Rabbit 1530 mg/kg

Flammability characteristics:

LOWER 1.8%

Explosive limit:

vol% in air: 1.8

Odor:

SHARP, HYDROCHLORIC ACID-LIKE ODOR; ACRID.

Experimental Properties:

Ratio of specific heats of vapor (gas): 1.0683. (est)|Readily hydrolyzed with liberation of hydrochloric acid|Organo-functional silanes are noted for their ability to bond organic polymer systems to inorganic substrates /Silane cmpd/|The reaction of organosilanes with halogens and halogen cmpd usually proceeds in good yield through cleavage of the Si--H bond and formation of the silicon-halogen bond. Reaction with fluorine, however, does not proceed satisfactorily because of cleavage of not only the Si--H but also C--Si and C--H bonds. Direct halogenation with chlorination, bromine, and iodine proceeds smoothly, however. /Organosilanes/|Hydroxyl radical reaction rate constant = 4.49X10-13 cu cm/molec sec at 25 °C (est)

Air and Water Reactions:

Highly flammable. Fumes in air. Reacts vigorously and exothermically with water. Products of the reaction include hydrogen chloride. The heat may be sufficient to ignite nearby combustible materials. Trimethylchlorosilane reacts vigorously with water to generate gaseous HCl. Based on a scenario where the chemical is spilled into an excess of water (at least 5 fold excess of water), half of the maximum theoretical yield of Hydrogen Chloride gas will be created in 1.3 minutes. Experimental details are in the following: "Development of the Table of Initial Isolation and Protective Distances for the 2008 Emergency Response Guidebook", ANL/DIS-09-2, D.F. Brown, H.M. Hartmann, W.A. Freeman, and W.D. Haney, Argonne National Laboratory, Argonne, Illinois, June 2009.

Reactive Group:

Chlorosilanes

Reactivity Alerts:

Highly Flammable

Reactivity Profile:

TRIMETHYLCHLOROSILANE reacts vigorously and exothermically with water to produce hydrogen chloride.

Autoignition Temperature:

743 °F (USCG, 1999)|743 °F (395 °C)|395 °C

Heat of Combustion:

-10,300 BTU/LB (EST)

Flammable Limits:

Lower flammable limit: 1.8% by volume; Upper flammable limit: 6.0% by volume|LOWER 1.8%

Physical Dangers:

The vapour is heavier than air and may travel along the ground; distant ignition possible.

Heat of Vaporization:

126 BTU/LB

See More Chlorotrimethylsilane Properties 

Hazard Identification

Classification of the substance or mixture

Flammable liquids, Category 2

Acute toxicity - Category 3, Oral

Acute toxicity - Category 4, Dermal

Skin corrosion, Sub-category 1A

Acute toxicity - Category 3, Inhalation

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Danger
Hazard statement(s)	H225 Highly flammable liquid and vapour H301 Toxic if swallowed H312 Harmful in contact with skin H314 Causes severe skin burns and eye damage H331 Toxic if inhaled
Prevention	P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. P233 Keep container tightly closed. P240 Ground and bond container and receiving equipment. P241 Use explosion-proof [electrical/ventilating/lighting/...] equipment. P242 Use non-sparking tools. P243 Take action to prevent static discharges. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/... P264 Wash ... thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P271 Use only outdoors or in a well-ventilated area.
Response	P303+P361+P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse affected areas with water [or shower]. P370+P378 In case of fire: Use ... to extinguish. P301+P316 IF SWALLOWED: Get emergency medical help immediately. P321 Specific treatment (see ... on this label). P330 Rinse mouth. P302+P352 IF ON SKIN: Wash with plenty of water/... P317 Get medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P363 Wash contaminated clothing before reuse. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P316 Get emergency medical help immediately. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Storage	P403+P235 Store in a well-ventilated place. Keep cool. P405 Store locked up. P403+P233 Store in a well-ventilated place. Keep container tightly closed.
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, NO sparks and NO smoking. NO contact with hot surfaces. Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling. 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

Fireproof. Separated from food and feedstuffs and other compounds. Cool. Dry. Well closed.Storage temperature; ambient.

See More Chlorotrimethylsilane 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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Inquiry History

3 Inquiries

Country	Product	Purchase Quantity	Date Posted
South Korea	TMCS Trimethylchlorosilane	1 MT	Jan 14, 2026
India	Chlorotrimethylsilane 99% powder or vials/Liquid or oily/Crystal or Ointment Chlorotrimethylsilane	1 MT	Jun 30, 2023
Romania	Trimethylchlorosilane	680 KG	Sep 30, 2025

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Chlorotrimethylsilane75-77-4

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