聚氨酯

Description

Urethane · CAS 51-79-6 · C3H7NO2. UNII 3IN71E75Z5. Boiling Point: 360 to 363 °F at 760 mmHg (NTP, 1992); Boiling Point: 185; Boiling Point: 185 °C.

Identification

CAS Registry Number	51-79-6
PubChem CID	5641
Molecular formula	C3H7NO2
IUPAC name	ethyl carbamate
UNII (FDA)	3IN71E75Z5

Computed Descriptors

Molecular Weight	89.09
XLogP3	-0.2
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	2
Exact Mass	89.047678466
Monoisotopic Mass	89.047678466
Topological Polar Surface Area	52.3
Heavy Atom Count	6
Formal Charge	0

Physical & Chemical Properties

Boiling Point	360 to 363 °F at 760 mmHg (NTP, 1992)
Boiling Point	185
Boiling Point	185 °C
Boiling Point	185.00 °C. @ 760.00 mm Hg
Melting Point	118 to 122 °F (NTP, 1992)
Melting Point	49
Melting Point	49 °C
Melting Point	48.5 - 50 °C
Flash Point	198 °F (NTP, 1992)
Flash Point	92 °C c.c.

Physical description & handling notes

• Urethane appears as odorless colorless crystals or white powder. Sublimes readily at 217 °F and 54 mmHg. Cooling saline taste.
• Water-soluble crystals or white powder; [CAMEO]
• Solid
• ODOURLESS COLOURLESS CRYSTALS. PELLETS OR WHITE GRANULAR POWDER.
• Colorless, columnar crystals or white, granular powder
• Prisms from benzene and toluene

Regulatory Status

Regulatory & Food Contact	CONTAMINANT: Food Contaminant TRS 930-JECFA 64/31 FAS 55-JECFA 64/205

GHS Hazard Classification

Reported hazard statements	H350, H302 (27.1%), H312, H336, H341, H361, H373, H340

Documented Uses

• Used as an antineoplastic agent, veterinary anesthetic, and chemical intermediate; [ChemIDplus] Used as an intermediate, amino resin modifier, solvent, and animal anesthetic; Occurs naturally in fermented wines and foods; [Merck Index]
• SOLUBILIZER & CO-SOLVENT FOR COSMETICS.
• AS CHEMICAL INTERMEDIATE, PRIMARILY FOR REACTION WITH FORMALDEHYDE TO PRODUCE N-HYDROXYMETHYL DERIVATIVES, WHICH ARE USEFUL AS CROSS LINKING AGENTS IN TEXTILE TREATMENTS DESIGNED TO IMPART WASH AND WEAR PROPERTIES TO FABRICS.
• For more Uses (Complete) data for ETHYL CARBAMATE (6 total), please visit the HSDB record page.
• Small quantities of ethyl carbamate are still used in laboratories as an anesthetic for animals. Ethyl carbamate is found in many alcoholic beverages, especially distilled spirits.
• Food Contaminant -> CONTAMINANT -> JECFA Functional Classes

Synonyms

urethane; ETHYL CARBAMATE; 51-79-6; Carbamic acid, ethyl ester; Leucethane; Pracarbamine; Carbamic acid ethyl ester; Ethyl urethane; Ethylcarbamate; Ethylurethane; O-Ethylurethane; Pracarbamin; Ethyl urethan; Leucothane; U-Compound; Aethylcarbamat

Frequently Asked Questions

What are the CAS number and molecular formula of Urethane?

CAS 51-79-6; molecular formula C3H7NO2; molecular weight — g/mol.

What other names is Urethane known by?

urethane, ETHYL CARBAMATE, 51-79-6, Carbamic acid, ethyl ester, Leucethane, Pracarbamine.

What is the regulatory status of Urethane?

Documented regulatory listings: CONTAMINANT: Food Contaminant; TRS 930-JECFA 64/31; FAS 55-JECFA 64/205.

Is Urethane classified as hazardous?

Hazard statements reported: H350, H302, H312, H336, H341.

What are the key physical properties of Urethane?

Boiling Point: 360 to 363 °F at 760 mmHg (NTP, 1992); Boiling Point: 185; Boiling Point: 185 °C; Boiling Point: 185.00 °C. @ 760.00 mm Hg.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.