Tolylene-2,4-diisocyanate CAS#584-84-9
1. Stable Yet Sensitive: Generally stable but sensitive to moisture, heat, and light, requiring careful storage.
2. Versatile Solubility: Miscible with various solvents, including ether, acetone, and benzene.
3. High Reactivity: Reacts with compounds containing active hydrogen, useful in polymerization processes.
4. Toxicity Precautions: Toxic at high doses and requires safe handling to avoid exposure.
Toluene-2,4-diisocyanate is a clear and colorless liquid under standard conditions and is moisture-sensitive. It is a fairly stable substance, yet it tends to undergo hydrolysis and must be kept in a cool, dry, and airy location, away from direct sunlight.
Parameters
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 |
