Tolylene-2,4-diisocyanate CAS#584-84-9

Moderate Stability with Environmental Sensitivity
The product maintains structural stability under standard storage environments, but degradation can be triggered by moisture, elevated temperature and UV irradiation; strict storage control is essential.
Broad Miscibility with Organic Media
Miscible in all proportions with ether, acetone, benzene and multiple other organic solvents.
Elevated Reaction Activity
Capable of rapid chemical reaction with all active hydrogen-bearing compounds, serving as a critical raw material for polymer synthesis.
Toxicological Handling Requirements
The material poses toxic risks at high exposure levels; standardized safety operation procedures must be followed to prevent skin, respiratory and eye contact.

Toluene-2,4-diisocyanate appears as a transparent colorless liquid under standard atmospheric conditions and exhibits strong moisture sensitivity. Despite its baseline chemical stability, hydrolysis will occur upon exposure to humidity. Storage requirements: cool, dry, well-ventilated space, isolated from direct solar radiation.

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Melting point	20-22 °C(lit.)
Boiling point	124-126 °C18 mm Hg(lit.)
density	1.225 g/mL at 25 °C
vapor density	6 (vs air)
vapor pressure	0.03 mm Hg ( 25 °C)
refractive index	n20/D 1.568(lit.)
Fp	250 °F
storage temp.	2-8°C
solubility	Miscible with ether, acetone, benzene, carbontetrachloride and chlorobenzene.
form	Liquid
Specific Gravity	1.225
color	Colorless
Odor	Sharp, pungent odor detectable at 0.02 to 0.4 ppm
explosive limit	9.5%
Water Solubility	reacts
Sensitive	Moisture Sensitive
Merck	14,9530
BRN	744602
Exposure limits	TLV-TWA 0.0355 mg/m3 (0.005 ppm) (ACGIH and NIOSH); STEL or ceiling/10 min 0.142 mg/m3 (0.02 ppm) (ACGIH, NIOSH, and OSHA); IDLH 71 mg/m3 (10 ppm) (NIOSH).
Stability:	Stable, but decomposes in the presence of moisture. Also heat and light sensitive. Readily polymerizes in contact with base. Reacts with compounds containing active hydrogen. Incompatible with strong oxidizing agents. Corrodes some copper and aluminium alloys.
InChIKey	DVKJHBMWWAPEIU-UHFFFAOYSA-N
LogP	3.43 at 22℃
CAS DataBase Reference	584-84-9(CAS DataBase Reference)
NIST Chemistry Reference	Benzene, 2,4-diisocyanato-1-methyl-(584-84-9)
EPA Substance Registry System	Toluene-2,4-diisocyanate (584-84-9)

Safety Information

Hazard Codes	T+
Risk Statements	26-36/37/38-40-42/43-52/53
Safety Statements	23-36/37-45-61
RIDADR	UN 2078 6.1/PG 2
WGK Germany	2
RTECS	CZ6300000
F	10-21
Autoignition Temperature	>619 °C
TSCA	Yes
HazardClass	6.1
PackingGroup	II
HS Code	29291010
Hazardous Substances Data	584-84-9(Hazardous Substances Data)
Toxicity	Acute oral LD50 for rats 5,800 mg/kg, wild birds 100 mg/kg (quoted, RTECS, 1985).
IDLA	2.5 ppm