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Free lookupCAS 57-13-6

Urea

CAS 57-13-6 · PubChem CID 1176 · CH4N2O · 60.056 g/mol

Also called urea, carbamide, Carbonyldiamide, Ureophil, Carbonyldiamine.

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01GHS classification

No harmonised GHS classification is published for this substance in the sources we read. We will not guess one.

02Physical and chemical properties
Appearance

White crystals with characteristic odour.

ILO-WHO International Chemical Safety Cards (ICSCs)fetched 2026-08-28

Odour

May gradually develop slight odor of ammonia, esp in presence of moisture

Hazardous Substances Data Bank (HSDB)fetched 2026-08-28

Melting point

132.7-135 °C

ILO-WHO International Chemical Safety Cards (ICSCs)fetched 2026-08-28

Boiling point

Decomposes

Hazardous Substances Data Bank (HSDB)fetched 2026-08-28

Flash point

no value printed

unsourced — inference candidate

Auto-ignition temperature

Not flammable (USCG, 1999)

CAMEO Chemicalsfetched 2026-08-28

Flammable limits

no value printed

unsourced — inference candidate

Vapour pressure

1.2X10-5 mm Hg @ 25 °C

Hazardous Substances Data Bank (HSDB)fetched 2026-08-28

Relative density

no value printed

unsourced — inference candidate

Solubility in water

Solubility in water: miscible

ILO-WHO International Chemical Safety Cards (ICSCs)fetched 2026-08-28

Partition coefficient, log Kow

no value printed

unsourced — inference candidate

Viscosity

no value printed

unsourced — inference candidate

03Toxicological information

No published acute toxicity value was found for this substance in the sources we read. On a document, Section 11 would print unsourced — inference candidate rather than an estimate.

This page is the evidence. The document is the deliverable.

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What we read

Hazardous Substances Data Bank (HSDB), ILO-WHO International Chemical Safety Cards (ICSCs), CAMEO Chemicals.

7 sourced records for this substance are in the ledger. Values dated more than 30 days ago are re-fetched on the next document.