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Tolylene-2,4-diisocyanate Structure

Tolylene-2,4-diisocyanate

Chemical Properties

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.)
Flash point 250 °F
storage temp.  2-8°C
solubility  Miscible with ether, acetone, benzene, carbontetrachloride and chlorobenzene.
form  Liquid
color  Colorless
Specific Gravity 1.225
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℃
Indirect Additives used in Food Contact Substances TOLUENE 2,4-DIISOCYANATE
FDA 21 CFR 175.105
CAS DataBase Reference 584-84-9(CAS DataBase Reference)
FDA UNII 17X7AFZ1GH
Proposition 65 List Toluene Diisocyanate
NIST Chemistry Reference Benzene, 2,4-diisocyanato-1-methyl-(584-84-9)
EPA Substance Registry System Toluene-2,4-diisocyanate (584-84-9)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H315-H317-H319-H330-H334-H335-H351-H412
Precautionary statements P202-P273-P280-P302+P352-P304+P340+P310-P305+P351+P338
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
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
NFPA 704:
1
3 2

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