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Hydroxylamine7803-49-8

Name: Hydroxylamine7803-49-8
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CAS No.:

7803-49-8

Grade:

Pharmaceutical Grade

Content:

99.5%

Port:

shanghai

Brand:

OORENT

Packaging:

Vial/Bottle/Bag/Carton

Sample Available:

Yes

Price valid (until):

2026-10-14

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Description

Product Detail

Hydroxylamine Basic information

Description References

Product Name:	Hydroxylamine
Synonyms:	hydroxylamine,freebase;hydroxylaminefree-base;Oxyammonia;FH-50;FH-50TM;Hydroxylamine solution;HYDROXYLAMINE, 50 WT. % SOLUTION IN WATE R;HYDROXYLAMINE, 99.999%, 50 WT. SOLUTION IN WATER
CAS:	7803-49-8
MF:	H3NO
MW:	33.03
EINECS:	232-259-2
Product Categories:	Pharmaceutical Intermediates;C-X Bond Formation (Non-Halogen);Others;Synthetic Reagents;7803-49-8
Mol File:	7803-49-8.mol

Hydroxylamine Chemical Properties

Melting point	7°C
Boiling point	>100 °C
density	1.078 g/mL at 25 °C
vapor pressure	9 mm Hg ( 40 °C)
refractive index	n20/D 1.393
RTECS	NC2975000
storage temp.	Store below +30°C.
solubility	Water
pka	pK (20°) 7.97
form	white flakes or needles
color	white orthorhombic flakes or needles
PH	10.6 (20°C in H2O)
Water Solubility	Miscible with water, liquid ammonia and methanol. Slightly miscible with ether, benzene, carbon disulfide and chloroform.
Merck	13,4853
Henry's Law Constant	1.4×10³ mol/(m³Pa) at 25℃, HSDB (2015)
Stability:	Stable. Incompatible with oxidizing agents, potassium dichromate, chromium trioxide, zinc, calcium, copper, sodium, ammonia, carbonyls, phosphorus halides, pyridine, hypochlorites.
InChI	1S/H3NO/c1-2/h2H,1H2
InChIKey	AVXURJPOCDRRFD-UHFFFAOYSA-N
SMILES	NO
CAS DataBase Reference	7803-49-8(CAS DataBase Reference)
NIST Chemistry Reference	Hydroxylamine(7803-49-8)
EPA Substance Registry System	Hydroxylamine (7803-49-8)

Safety Information

Hazard Codes	Xn,N
Risk Statements	5-22-37/38-41-43-48/22-50-40-21/22
Safety Statements	23-26-36/37/39-47-61-22-46
RIDADR	UN 3082 9/PG 3
WGK Germany	3
F	4.8
Autoignition Temperature	215°C
TSCA	TSCA listed
HazardClass	8
PackingGroup	II
HS Code	28251090
Storage Class	3 - Flammable liquids
Hazard Classifications	Acute Tox. 4 Oral Aquatic Acute 1 Carc. 2 Desen. Expl. 4 Eye Dam. 1 Met. Corr. 1 Skin Irrit. 2 Skin Sens. 1 STOT RE 2 STOT SE 3
Hazardous Substances Data	7803-49-8(Hazardous Substances Data)
Toxicity	LD50 i.p. in mice: 1.83 mmol/kg (Smith, Layne)

MSDS Information

Provider	Language
SigmaAldrich	English
ALFA	English

Hydroxylamine Usage And Synthesis

Description	Hydroxylamine is the hydroxyl derivative of ammonia. Hydroxylamine is used as a nucleophile in aromatic substitution reactions and as a reducing agent. By the reaction with aldehydes, hydroxylamine forms oximes, which are intermediates in the commercial production of polyamide plastics. Some hydroxylamine converted oximes are used in smaller amounts as pharmaceuticals, pesticides, and varnishes to prevent formation of a skin. With it is reduction ability, hydroxylamine is used as an antioxidant in photographic developers, to stabilize polymerization monomers, and to reduce Cu2+ in the dyeing of acrylic fibers. Hydroxylamine can be converted into hydroxylamine-O-sulphonic acid, which is a good aminating agent. Hydroxylamine can also be used as an intermediate in nitrification. It is further used in semiconductor industry in the cleaning formations, such as for aluminum interconnect.
References	Stephen A. Lawrence, Amines: Synthesis, Properties and Applications, 2004, ISBN 0521782848 Howard Lees, Hydroxylamine as an intermediate in nitrification, Nature, 1951, vol. 169, 156-157 Egon Wiberg and Nils Wiberg, Inorganic Chemistry, 2001, ISBN 0123526515 https://www.britannica.com/science/hydroxylamine Karen A. Reinhardt and Richard F. Reidy, Handbook for Cleaning for Semiconductor Manufacturing: Fundamentals and Applications, 2011, ISBN 9780470625958
Description	Hydroxylamine was first synthesized by Wilhem Clemens Lossen in 1865 in the laboratory of Wilhelm Heinrich Heintz while working in Halle. The Lossen synthesis originally generated hydroxylamine in aqueous solution. Anhydrous hydroxylamine was prepared later by Lobry de Bruyn and Crismer in 1891. The free base is extremely volatile, and industrial-scale production has been fraught with problems, including large explosions at facilities in the United States and Japan. Much of the hydroxylamine produced and transported is in salt form or as a dilute aqueous solution.
Chemical Properties	slightly yellow liquid
Physical properties	White crystalline solid; orthogonal plates or needles; unstable; density 1.21g/cm3at 20°C; melts at 33°C; vaporizes at 58°C; very soluble in water, liquidammonia and lower alcohols; sparingly soluble in most other organic solvents;decomposes in hot water; pKa5.94 at 25°C.
Uses	Reducing agent used in photographic processing, leather tanning, manufacturing of nylon and other polymers; as a stabilizer for natural rubber; to prevent the development of objectionable tastes and odors during the refining of fatty materials.
Uses	Hydroxylamine is used as a reducing agent in photography, in synthetic and analytical chemistry, as an antioxidant for fatty acids and soaps, and as a dehairing agent for hides. In addition, hydroxylamine is used in the production of cyclohexanone oxime, an isomer of caprolactam, which is an intermediate in the production of nylon-6. In the semiconductor industry, hydroxylamine can be a component of a solution that dissolves a photoresist following lithography. Hydroxylamine can also be used to selectively cleave asparaginyl-glycine peptide bonds.
Uses	Reducing agent, organic synthesis.
Definition	ChEBI: The simplest hydroxylamine, consisting of ammonia bearing a hydroxy substituent. It is an intermediate in the biological nitrification by microbes like bacteria.
Definition	hydroxylamine: A colourless solid,NH₂OH, m.p. 33°C. It explodes onheating and may be employed as anoxidizing agent or reducing agent. Itis made by the reduction of nitratesor nitrites, and is used in makingnylon. With aldehydes and ketones itforms oximes.
Preparation	Hydroxylamine is unstable as a free base. It is prepared from hydroxy-lamine hydrochloride, NH2OHHCl, which is obtained by electrolytic reduc-tion of ammonium chloride solution. The hydrochloride undergoes alkalinedecomposition to hydroxylamine, which is collected by vacuum distillation.
General Description	Odorless white crystalline solid. Sinks and mixes with water.
Air & Water Reactions	Decomposes rapidly at room temperature or when dissolved in hot water by internal oxidation-reduction. Reacts with water or steam to produce heat and corrosive liquids.
Reactivity Profile	HYDROXYLAMINE is a white solid, thermally unstable, decomposes rapidly at room temperature or when dissolved in hot water by internal oxidation-reduction. HYDROXYLAMINE should be stored below 10° C [Bailar, 1973, vol. 2, p. 272]. Explosive reaction with strong oxidizers (chromium trioxide, potassium dichromate) or powdered zinc upon heat. Reaction with zinc or calcium produces explosive bishydroxylamides. HYDROXYLAMINE ignites on contact with cupric sulfate, alkali metals (sodium, potassium), oxidants (e.g., barium oxide, barium peroxide, lead dioxide, potassium permanganate, chlorine), phosphorus trichloride and pentachloride. HYDROXYLAMINE reacts vigorously with hypochlorites, pyridine, carbonyls [Sax, 9th ed., 1996, p. 1875]. On contact with organic materials in thin layer (e.g., crystals on filter paper), HYDROXYLAMINE may ignite spontaneously in air. HYDROXYLAMINE explodes when heated above 70° C [Brauer, 1963, vol. 1, p. 502]. During a distillation process, an explosion occurred. Potassium hydroxide is thought to be involved in the explosion. Employees in the plant complained of chest pains and suffered chemical burns. Five people were killed by the explosion.
Hazard	Decomposes rapidly at room temperature, violently when heated, detonates in flame-heated test tube. Irritant to tissue.
Health Hazard	INHALATION: Moderately toxic by inhalation and oral routes with the following symptoms possible: headache, vertigo, tinnitus, dyspnea, nausea and vomiting, cyanosis, proteinuria and hematuria, jaundice, restlessness, and convulsion. Methemoglobinemia has been reported. EYES: Corrosive - highly irritating. SKIN: Irritating or corrosive to skin. INGESTION: Moderately toxic by inhalation and oral routes with the following symptoms possible; headache, vertigo, tinnitus, dyspnea, nausea and vomiting, cyanosis, proteinuria and hematuria, jaundice, restlessness, and convulsion. Methemoglobinemia has been reported.
Contact allergens	Hydroxylamine and its salts are used in various branches of industry, as reducing agents in color film developers or as reagents in laboratories.
Potential Exposure	Potential Exposure:Mutagen.Those involved in chemical synthesis or use of hydroxyI-amine. Used as a reducing agent.
First aid	If this chemical gets into the eyes, remove any con-tact lenses at once and irrigate immediately for at least 15 min,occasionally lifting upper and lower lids. Seek medical atten-tion immediately. If this chemical contacts the skin, removecontaminated clothing and wash immediately with soap andwater. Seek medical attention immediately. If this chemicalhas been inhaled, remove from exposure, begin rescue breath-ing (using universal precautions, including resuscitation mask)if breathing has stopped and CPR if heart action has stopped.Transfer promptly to a medical facility. When this chemicalhas been swallowed, get medical attention. If victim is con-scious, administer water or milk. Do not induce vomiting.Note to physician: Treat for methemoglobinemia. Test urineformethemoglobinemia. Spectrophotometry may berequired for precise determination of levels of methemoglo-bin in urine.
Carcinogenicity	Carcinogenicity of hydroxylamine and its salts has not been demonstrated. Several studies have shown a decreased incidence of spontaneous mammary tumors in mice exposed to the sulfate and hydrochloride.3–7 There was some indication of an increase in the incidence of spontaneous mammary tumors when the sulfate was administered to older animals whose mammary glands were already well developed.
Environmental Fate	The large-scale production and use of hydroxylamine may result in its release to the environment through various waste streams. Hydroxylamine will exist solely as a vapor in the ambient atmosphere, and will be degraded in the atmosphere by reaction with photochemically produced hydroxyl radicals; the half-life for this reaction in air is estimated to be 18 h. Abiotic degradation of hydroxylamine by photochemically produced peroxy radicals is an important environmental fate process in surface waters, with the half-life of the reaction measured at approximately 2 h. An estimated bioconcentration factor of 3 suggests that the potential for bioconcentration in aquatic organisms is low. If released terrestrially, hydroxylamine will most likely exist in its protonated form due to its pKa of 5.94; the protonated form is nonvolatile. Koc estimates of 14 for hydroxylamine suggest that it may have very high mobility in soil.
storage	(1) Color Code- Yellow Stripe (strong reducingagent): Reactivity Hazard; Store separately in an area iso-lated from flammables, combustibles, or other yellow-codedmaterials. (2) Color Code- Blue: Health Hazard/Poison:Store in a secure poison location. Prior to working with thischemical you should be trained on its proper handling andstorage. Protect against physical damage. Store in cool, non-combustible buildings and separate from oxidizing materi-als. Open airtight containers occasionally to relieve pressurefrom decomposition products.
Shipping	Toxic solid, corrosive, inorganic, n.o.s. requires ashipping label of“POISONOUS/TOXIC MATERIALS,CORROSIVE.”It falls in DOT/UN Hazard Class 6.1 andPacking Group II.
Purification Methods	Crystallise it from n-butanol at -10o, collect it by vacuum filtration and wash it with cold diethyl ether. Harmful vapours. [Hurd Inorg Synth I 87 1939, Semon in Org Synth Coll Vol I 318 1932.]
Toxicity evaluation	Hydroxylamine acts as a reducing agent when absorbed systemically, producing methemoglobin and the formulation of Heinz bodies in the blood. It can induce hemolytic anemia. It inhibits platelet aggregation and is a nitric oxide vasodilator. Oxylamines such as hydroxylamine and methoxylamine disturb DNA replication and act as potent mutagens, causing nucleotide transition from one purine to another or one pyrimidine to another. Allergic reactions of the skin following dermal exposure to hydroxylamine resemble contact eczema, or possibly urticaria of Quincke’s edema. The pathogenesis of this reaction appears to be mediated by a delayed type T-lymphocyte reaction.
Incompatibilities	Self reactive. Contaminants， tempera-tures above 129.4℃, or open flame can cause explosivedecomposition, especially in the presence of moisture andcarbon dioxide. Incompatible with strong acids, organicanhydrides, isocyanates, aldehydes, sodium, finely dividedzinc, some metal oxides. Aqueous solution is a weak base.Contact with strong oxidizers may cause a fire and explo-sion hazard. Attacks some metals. Contact with calcium orzinc forms a heat-sensitive explosive [bis(hydroxylamide)](Sax).

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ECHEMI Editorial Reference

slightly yellow liquid
Hydroxylamine is an odorless white crystalline solid. Sinks and mixes with water. (USCG, 1999)|Liquid|Solid|VERY HYGROSCOPIC WHITE NEEDLES OR FLAKES.
Hydroxylamine is an odorless white crystalline solid. Sinks and mixes with water. (USCG, 1999)|Hydroxylamine is the simplest hydroxylamine, consisting of ammonia bearing a hydroxy substituent. It is an intermediate in the biological nitrification by microbes like bacteria. It has a role as a nitric oxide donor, an EC 1.1.3.13 (alcohol oxidase) inhibitor, a nucleophilic reagent, an EC 4.2.1.22 (cystathionine beta-synthase) inhibitor, an EC 4.3.1.10 (serine-sulfate ammonia-lyase) inhibitor, a bacterial xenobiotic metabolite and an algal metabolite. It is a conjugate acid of a hydroxyazanide and an aminooxidanide. It derives from a hydride of an ammonia.|A colorless inorganic compound (HONH2) used in organic synthesis and as a reducing agent, due to its ability to donate nitric oxide.

Basic Info

Product Name:

Hydroxylamine

Other Name:

Hydroxylamine;Hydroxyamine;Telclean 1200A;HDA;EKC 270T

CAS No.:

7803-49-8

Molecular Formula:

H3NO

InChIKeys:

InChIKey=AVXURJPOCDRRFD-UHFFFAOYSA-N

Molecular Weight:

33.03

Exact Mass:

33.03

EC Number:

232-259-2

UNII:

2FP81O2L9Z

ICSC Number:

0661

UN Number:

2735

DSSTox ID:

DTXSID7041043

Color/Form:

Colorless cyrstals|Large white flakes or white needles

HScode:

28251090

Categories:

Organic Reagents

Characteristics

PSA:

46.25000

XLogP3:

-0.81

Appearance:

Hydroxylamine is an odorless white crystalline solid. Sinks and mixes with water. (USCG, 1999)

Density:

1.227 g/cm³

Melting Point:

33 °C

Boiling Point:

70 °C @ Press: 60 Torr

Flash Point:

265 °F (USCG, 1999)|explodes at 129 °C

Refractive Index:

1.395

Water Solubility:

Miscible with water, liquid ammonia and methanol. Slightly miscible with ether, benzene, carbon disulfide and chloroform.

Storage Conditions:

Separate from oxidizing materials. store in a cool, dry, well-ventilated location. store away from heat, oxidizers, and sunlight. Outside or detached storage is preferred.

Vapor Pressure:

9 mm Hg ( 40 °C)

Vapor Density:

Relative vapor density (air = 1): 1.1

Toxicity:

Celiac-rat LD50: 59 mg/kg; Celiac-mouse LD50: 60 mg/kg

Flammability characteristics:

Thermal decomposition of toxic nitrogen oxide fumes

Dissociation Constants:

pKa= 5.94 @ 25 °C

Experimental Properties:

VERY HYGROSCOPIC; ALKALINE REACTION; DECOMP BY HOT WATER; HEAT OF FORMATION (SOLID): -27.60 KCAL/MOL AT 18 °C & 1 ATM; (LIQ): -25.5 KCAL/MOL AT 18 °C & 1 ATM|REDUCING AGENT IN ALKALINE, OXIDIZING AGENT IN ACID MEDIUM|COLORLESS MONOCLINIC CRYSTALS; BP: DECOMP; SLIGHTLY SOL IN ALC; SOL IN ETHER /SULFATE/|Decomposes in hot water|Monoclinic columnar crystals; slowly decomp when moist; density: 1.67 at 17 °C; mp: about 151 °C; pK of 0.2 molar aq soln 3.2; 1 g sol in 1 ml H2O, 19 ml alc, 8 ml methanol; sol in glycerol, propylene glycol; insol in cold ether /Hydroxylamine hydrochloride/

Air and Water Reactions:

Decomposes rapidly at room temperature or when dissolved in hot water by internal oxidation-reduction. Reacts with water or steam to produce heat and corrosive liquids.

Reactive Group:

Bases, Strong

Reactivity Alerts:

Explosive

Reactivity Profile:

HYDROXYLAMINE is a white solid, thermally unstable, decomposes rapidly at room temperature or when dissolved in hot water by internal oxidation-reduction. It should be stored below 10° C [Bailar, 1973, vol. 2, p. 272]. Explosive reaction with strong oxidizers (chromium trioxide, potassium dichromate) or powdered zinc upon heat. Reaction with zinc or calcium produces explosive bishydroxylamides. It ignites on contact with cupric sulfate, alkali metals (sodium, potassium), oxidants (e.g., barium oxide, barium peroxide, lead dioxide, potassium permanganate, chlorine), phosphorus trichloride and pentachloride. It reacts vigorously with hypochlorites, pyridine, carbonyls [Sax, 9th ed., 1996, p. 1875]. On contact with organic materials in thin layer (e.g., crystals on filter paper), it may ignite spontaneously in air. It explodes when heated above 70° C [Brauer, 1963, vol. 1, p. 502]. During a distillation process, an explosion occurred. Potassium hydroxide is thought to be involved in the explosion. Employees in the plant complained of chest pains and suffered chemical burns. Five people were killed by the explosion.

Autoignition Temperature:

265 °F (USCG, 1999)

See More Hydroxylamine Properties 

Hazard Identification

Classification of the substance or mixture

Explosives, Unstable explosive

Corrosive to metals, Category 1

Acute toxicity - Category 4, Oral

Acute toxicity - Category 4, Dermal

Skin irritation, Category 2

Serious eye damage, Category 1

Skin sensitization, Category 1

Specific target organ toxicity â single exposure, Category 3

Carcinogenicity, Category 2

Specific target organ toxicity â repeated exposure, Category 2

Hazardous to the aquatic environment, short-term (Acute) - Category Acute 1

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Danger
Hazard statement(s)	H200 Unstable explosive H290 May be corrosive to metals H302 Harmful if swallowed H312 Harmful in contact with skin H315 Causes skin irritation H318 Causes serious eye damage H317 May cause an allergic skin reaction H335 May cause respiratory irritation H351 Suspected of causing cancer H373 May cause damage to organs through prolonged or repeated exposure H400 Very toxic to aquatic life
Prevention	P203 Obtain, read and follow all safety instructions before use. P250 Do not subject to grinding/shock/friction/â¦. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/... P234 Keep only in original packaging. P264 Wash ... thoroughly after handling. P270 Do not eat, drink or smoke when using this product. 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. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P273 Avoid release to the environment.
Response	P370+P372+P380+P373 In case of fire: Explosion risk. Evacuate area. DO NOT fight fire when fire reaches explosives. P390 Absorb spillage to prevent material damage. P301+P317 IF SWALLOWED: Get medical help. P330 Rinse mouth. P302+P352 IF ON SKIN: Wash with plenty of water/... P317 Get medical help. P321 Specific treatment (see ... on this label). P362+P364 Take off contaminated clothing and wash it before reuse. P332+P317 If skin irritation occurs: Get medical help. P305+P354+P338 IF IN EYES: Immediately rinse 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. P319 Get medical help if you feel unwell. P318 IF exposed or concerned, get medical advice. P391 Collect spillage.
Storage	P401 Store in accordance withâ¦ P406 Store in a corrosion resistant/...container with a resistant inner liner. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P405 Store locked up.
Disposal	P503 Refer to manufacturer/supplierâ¦ for information on disposal/recovery/recycling. 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. 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 incompatible materials. See Chemical Dangers. Cool. Dry. Well closed.Separate from oxidizing materials. store in a cool, dry, well-ventilated location. store away from heat, oxidizers, and sunlight. Outside or detached storage is preferred.

See More Hydroxylamine 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 days

Total Annual Revenue:
$10 million-$25 million

Total Employees:
51-100

Year of Establishment:
2024

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Inquiry History

2 Inquiries

Country	Product	Purchase Quantity	Date Posted
Italy	Hydroxylamine 50% water solution	250 KG	Sep 13, 2026
South Korea	[LG Chem] Product Inquiry - Hydroxylamine solution (CAS No. 7803-49-8)	1 MT	Jan 18, 2024

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Hydroxylamine7803-49-8

Product Details

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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