1,3-Phenylene diisocyanate
[CAS# 123-61-5]

Identification

• Classification: Chemical reagent >> Organic reagent >> Cyanate ester / isocyanate
• Name: 1,3-Phenylene diisocyanate
• Synonyms: 1,3-Diisocyanatobenzene; Benzene 1,3-diisocyanate; NSC 511721; Nacconate 400; m-Phenylene diisocyanate; m-Phenylene isocyanate
• Molecular Formula: C₈H₄N₂O₂
• Molecular Weight: 160.13
• CAS Registry Number: 123-61-5
• EC Number: 204-637-7

Properties

• Solubility: Very slightly soluble (0.51 g/L) (25 ºC), Calc.^*
• Density: 1.17±0.1 g/cm³ (20 ºC 760 Torr), Calc.^*
• Melting point: 193-195 ºC^**
• Boiling point: 121 ºC (25 Torr)^***
• Flash point: 99.1±28.0 ºC, Calc.^*

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2015 ACD/Labs)

^** Brownstein, Arthur M.; US 3465024 A 1969.

^*** Modersohn, August; DE 848810 1952.

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin irritation	Skin Irrit.	2	H315
Eye irritation	Eye Irrit.	2	H319
Respiratory sensitization	Resp. Sens.	1	H334
Specific target organ toxicity - single exposure	STOT SE	3	H335
Acute toxicity	Acute Tox.	4	H312
Acute toxicity	Acute Tox.	4	H302
Acute toxicity	Acute Tox.	4	H332
Acute toxicity	Acute Tox.	3	H301
Acute toxicity	Acute Tox.	3	H331