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Urethane

Urethane
Urethane structure
CAS No.
51-79-6
Chemical Name:
Urethane
Synonyms
x41;X 41;a11032;nsc746;Uretan;NSC 746;nsc-746;A 11032;uretano;Urethan
CBNumber:
CB4368670
Molecular Formula:
C3H7NO2
Formula Weight:
89.09
MOL File:
51-79-6.mol

Urethane Properties

Melting point:
48-50 °C(lit.)
Boiling point:
182-184 °C(lit.)
Density 
1.10
vapor density 
3.07 (vs air)
vapor pressure 
10 mm Hg ( 77.8 °C)
refractive index 
1.4144
Flash point:
198 °F
storage temp. 
Room temperature.
solubility 
slightly soluble
form 
Crystals or Crystalline Powder
color 
White
PH
pH(50g/l, 25℃) : 5.0~7.0
Water Solubility 
slightly soluble
Merck 
14,9874
BRN 
635810
Stability:
Stable. Incompatible with strong acids, strong bases, strong oxidizing agents.
CAS DataBase Reference
51-79-6(CAS DataBase Reference)
NIST Chemistry Reference
Urethane(51-79-6)
EPA Substance Registry System
Carbamic acid, ethyl ester(51-79-6)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
  • NFPA
Hazard Codes  T
Risk Statements  45-22
Safety Statements  53-45-99
RIDADR  UN 3077 9 / PGIII
WGK Germany  3
RTECS  FA8400000
TSCA  Yes
HS Code  29241990
Hazardous Substances Data 51-79-6(Hazardous Substances Data)
Toxicity MLD i.p. in mice: 2.1-2.2 g/kg (Franklin)
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H340 May cause genetic defects Germ cell mutagenicity Category 1A, 1B Danger
H350 May cause cancer Carcinogenicity Category 1A, 1B Danger
H361 Suspected of damaging fertility or the unborn child Reproductive toxicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501
Precautionary statements:
P201 Obtain special instructions before use.
P202 Do not handle until all safety precautions have been read and understood.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P308+P313 IF exposed or concerned: Get medical advice/attention.
P405 Store locked up.
P501 Dispose of contents/container to..…

NFPA 704

Diamond Hazard Value Description
2
0
Health  
Flammability   2 Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur and multiple finely divided suspended solids that do not require heating before ignition can occur. Flash point between 37.8 and 93.3 °C (100 and 200 °F). (e.g. diesel fuel, sulfur)
Instability   0 Normally stable, even under fire exposure conditions, and is not reactive with water (e.g. helium,N2)
Special  

(NFPA, 2010)

Urethane price More Price(12)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 76607 Urethane analytical standard 51-79-6 100mg $140 2018-11-13 Buy
Sigma-Aldrich 94300 Urethane ≥99.0% (GC) 51-79-6 1kg $270 2018-11-13 Buy
TCI Chemical C0028 Ethyl Carbamate >98.0%(GC)(N) 51-79-6 25g $13 2018-11-22 Buy
TCI Chemical C0028 Ethyl Carbamate >98.0%(GC)(N) 51-79-6 100g $30 2018-11-22 Buy
Alfa Aesar 044804 Ethyl carbamate, 98% 51-79-6 50g $27.8 2018-11-16 Buy

Urethane Chemical Properties,Uses,Production

Description

Ethyl carbamate occurs as colourless or white columnar crystals or granular powder. It is very soluble in water. With heat, ethyl carbamate undergoes decomposition and emits toxic fumes of carbon monoxide, carbon dioxide, and nitrogen oxides. Ethyl carbamate is used as an intermediate in the synthesis of a number of chemical products, for example, pharmaceuticals, in biochemical research and medicine, and as a solubiliser and co-solvent for pesticides and fumigants. Prior to World War II, ethyl carbamate saw relatively heavy use in the treatment of multiple myeloma before it was found to be toxic, carcinogenic, and largely ineffective. However, due to U.S. FDA regulations, ethyl carbamate has been withdrawn from pharmaceutical use. However, small quantities of ethyl carbamate are also used in laboratories as an anaesthetic for animals.

Chemical Properties

Colorless crystals or white powder; odorless, saltpeter-like taste. Solutions neutral to litmus. Soluble in water, alcohol, ether, glycerol, and chloroform; slightly soluble in olive oil. Combustible.

Chemical Properties

Urethane is a colorless, almost odorless crystalline solid or powder.

Uses

Naturally occurring contaminant in fermented foods, particularly wine, stone-fruit brandies, and bread. This substance is reasonably anticipated to be a human carcinogen.

Uses

antiinfective

Uses

Intermediate in organic synthesis. In the preparation and modification of amino resins. As solvent, solubilizer and cosolvent for various organic materials. Animal anesthetic in laboratory procedures.

Definition

A poisonous flammable organic compound, used in medicine, as a solvent, and as an intermediate in the manufacture of polyurethane resins.

World Health Organization (WHO)

Urethane was formerly used as an antineoplastic agent in the treatment of chronic myeloid leukaemia. It is also a mild hypnotic which has been used as an anaesthetic for veterinary practice. It has been reported to have both a carcinogenic and mutagenic potential. Although urethane continues to be used as an industrial solvent, WHO has no information to suggest that it remains commercially available in pharmaceutical preparations.

General Description

Odorless colorless crystals or white powder. Sublimes readily at 217°F and 54 mm Hg. Cooling saline taste.

Air & Water Reactions

Water soluble. Aqueous solutions are neutral to litmus .

Reactivity Profile

Urethane is incompatible with alkalis, acids, chloral hydrate, camphor, menthol and thymol. Also incompatible with antipyrine and salol. May react with strong oxidizing agents. Liquefies with benzoic acid, resorcinol and salicylic acid. Reacts with phosphorus pentachloride to form an explosive product .

Hazard

Toxic by ingestion.

Safety Profile

Confirmed carcinogen with experimental carcinogenic, neoplastigenic, and tumorigenic data. A transplacental carcinogen. Moderately toxic by ingestion, intraperitoneal, subcutaneous, intramuscular, parenteral, and intravenous routes. An experimental teratogen. Experimental reproductive effects. Human mutation data reported. Causes depression of bone marrow and occasionally focal degeneration in the brain. Can also produce central nervous system depression, nausea and vomiting. Has been found in over 1000 beverages sold in the United States. The most heavily contaminated liquors are bourbons, sherries, and fruit brandies (some had 1000 to 12,000 ppb urethane). Many whiskeys, table and dessert wines, brandies, and liqueurs contain potentially hazardous amounts of urethane. The allowable limit for urethane in alcoholic beverages is 125 ppb. It is formed as a side product during processing.Hot aqueous acids or alkalies decompose urethane to ethanol, carbon dioxide, and ammonia. Reacts with phosphorus pentachloride to form an explosive product. When heated it emits toxic fumes of NOx. Used as an intermedate in the manufacture of pharmaceuticals, pesticides, and fungicides. See also CARBAMATES.

Potential Exposure

Urethane is used as a chemical intermediate in manufacture of pharmaceuticals; pesticides, and fungicides; in the preparation of amino resins. It may be reacted with formaldehyde to give cross-linking agents which impart wash-and-wear properties to fabrics. It has also been used as a solubilizer and cosolvent in the manufacture of pesticides, fumigants, and cosmetics. It was formerly used in the treatment of leukemia. It occurs when diethylpyrocarbonate, a preservative used in wines, fruit juices, and soft drinks, is added to aqueous solutions.

First aid

Move victim to fresh air. Call 911 or emergency medical service. Give artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin. Keep victim warm and quiet. Effects of exposure (inhalation, ingestion, or skin contact) to substance may be delayed. Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves. Medical observation is recommended for 24 to 48 hours after breathing overexposure, as pulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consider administering a drug or other inhalation therapy.

Purification Methods

Urethane is best purified by fractional distillation, but it can be 20 25 1.4144. sublimed at ~103o/~50mm. It has also been recrystallised from *benzene. Its solubilitiy at room temperature is 2g/mL in H2O, 1.25g/mL in EtOH, 1.1g/mL in CHCl3, 0.67g/mL in Et2O and 0.03g/mL in olive oil. It is a suspected human carcinogen.[Beilstein 3 H 22, 3 IV 40.]

Incompatibilities

Dust may form explosive mixture with air. 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, gallium, perchlorate.

Waste Disposal

Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform to EPA regulations governing storage, transportation, treatment, and waste disposal. Controlled incineration (incinerator equipped with a scrubber or thermal unit to reduce nitrogen oxides emissions).

Urethane Preparation Products And Raw materials

Raw materials

Preparation Products


Urethane Suppliers

Global( 274)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Shenzhen Sendi Biotechnology Co.Ltd.
0755-23311925 18102838259
0755-23311925 Abel@chembj.com CHINA 3203 55
Henan DaKen Chemical CO.,LTD.
+86-371-55531817
info@dakenchem.com CHINA 21990 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 20680 55
Mainchem Co., Ltd.
+86-0592-6210733
+86-0592-6210733 sales@mainchem.com CHINA 32457 55
Xiamen AmoyChem Co., Ltd
+86 (0)592-605 1114
sales@amoychem.com CHINA 6374 58
career henan chemical co
+86-371-86658258
sales@coreychem.com CHINA 19923 58
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933 jkinfo@jkchemical.com;market6@jkchemical.com China 96815 76
Meryer (Shanghai) Chemical Technology Co., Ltd. +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
+86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-88580358(Beijing) sh@meryer.com China 40277 62
future industrial shanghai co., ltd 400-0066-400;021-60496031
021-55660885 sales@jonln.com China 2041 65
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 saleschina@alfa-asia.com China 30168 84

View Lastest Price from Urethane manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-18 Urethane
51-79-6
US $1.00 / kg 1kg 99% 500kg career henan chemical co

Urethane Spectrum


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