P

Phenyl isocyanate

IUPAC: isocyanatobenzene

C7H5NO Organic Compounds CAS 103-71-9
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Quick Reference
Formula / NotationC7H5NO
CAS Number103-71-9
Molecular Weight119.12
Melting PointFreezing point: -30 °C
Boiling Point158-168 °C
Density1.08870 at 25.9 °C/4 °C; 1.0956 at 19.6 °C/4 °C; 1.092 at 15 °C/4 °C; 1.101 at 11.6 °C/4 °C
SolubilityDecomposes in water, alcohol; very soluble in ether
AppearancePhenyl isocyanate appears as a colorless liquid. About the same density as water. Very toxic by ingestion, inhalation or skin absorption. Very irritating to skin, eyes and mucous membranes.
Also Known Asisocyanatobenzene; Isocyanatobenzene; 103-71-9; Benzene, isocyanato-; Phenylcarbimide; Carbanil; phenylisocyanate; Phenyl carbonimide; Fenylisokyanat; Isocyanic acid, phenyl ester
CategoryOrganic Compounds

What is Phenyl isocyanate?

Phenyl isocyanate is an isocyanate composed of a benzene ring bearing a single isocyanato substituent. It has a role as an allergen and a hapten. It is a member of benzenes and a member of isocyanates.

Formula & Notation

C7H5NO

IUPAC Name: isocyanatobenzene

Other Names / Synonyms: isocyanatobenzene; Isocyanatobenzene; 103-71-9; Benzene, isocyanato-; Phenylcarbimide; Carbanil; phenylisocyanate; Phenyl carbonimide; Fenylisokyanat; Isocyanic acid, phenyl ester

Properties & Characteristics

Appearance: Phenyl isocyanate appears as a colorless liquid. About the same density as water. Very toxic by ingestion, inhalation or skin absorption. Very irritating to skin, eyes and mucous membranes.. Molecular formula: C7H5NO. Molecular weight: 119.12 g/mol. Boiling point: 158-168 °C. Melting point: Freezing point: -30 °C. Density: 1.08870 at 25.9 °C/4 °C; 1.0956 at 19.6 °C/4 °C; 1.092 at 15 °C/4 °C; 1.101 at 11.6 °C/4 °C. Solubility: Decomposes in water, alcohol; very soluble in ether. Vapor pressure: 2.57 [mmHg]. LogP: 2.7.

Physical Data

PropertyValue
Melting PointFreezing point: -30 °C
Boiling Point158-168 °C
Density1.08870 at 25.9 °C/4 °C; 1.0956 at 19.6 °C/4 °C; 1.092 at 15 °C/4 °C; 1.101 at 11.6 °C/4 °C
Molecular Weight119.12
SolubilityDecomposes in water, alcohol; very soluble in ether
AppearancePhenyl isocyanate appears as a colorless liquid. About the same density as water. Very toxic by ingestion, inhalation or skin absorption. Very irritating to skin, eyes and mucous membranes.

Uses & Applications

Used as an industrial feedstock, solvent, pharmaceutical intermediate, flavoring agent, or chemical building block.

Safety Information

Flammable or irritant. Many organic compounds are flammable liquids or vapours. Keep away from ignition sources. Consult SDS for specific hazard data.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Phenyl isocyanate
Formula C7H5NO
CAS Number 103-71-9
Molecular Weight 119.12
Synonyms isocyanatobenzene; Isocyanatobenzene; 103-71-9; Benzene, isocyanato-; Phenylcarbimide; Carbanil; phenylisocyanate; Phenyl carbonimide; Fenylisokyanat; Isocyanic acid, phenyl ester

Frequently Asked Questions

Phenyl isocyanate is an isocyanate composed of a benzene ring bearing a single isocyanato substituent. It has a role as an allergen and a hapten. It is a member of benzenes and a member of isocyanates.

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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.