Products Description of Isophorone Diisocyanate (IPDI) CAS#4098-71-9
Isophorone diisocyanate, or IPDI (CAS#4098-71-9), appears as a transparent to light yellow liquid featuring a distinctive camphor‑type scent. It does not dissolve in water yet mixes homogenously with the majority of routine organic solvents. IPDI occurs as two stereoisomers, namely the cis and trans forms.

Isophorone diisocyanate Chemical Properties
Melting point | -60°C |
Boiling point | 158-159 °C15 mm Hg(lit.) |
density | 1.049 g/mL at 25 °C(lit.) |
vapor pressure | 0.0004 hPa (20 °C) |
refractive index | n20/D 1.484(lit.) |
Fp | >230 °F |
storage temp. | Store below +30°C. |
solubility | Miscible with esters, ketones, ethers, and aromatic and aliphatic hydrocarbons. |
form | Liquid |
color | Clear colorless to slightly yellow |
explosive limit | 0.7-4.5%(V) |
Water Solubility | <0.1 g/100 mL at 25 ºC |
Sensitive | Moisture Sensitive |
BRN | 2726467 |
Exposure limits | TLV-TWA 0.0454 mg/m3 (0.005 ppm) (ACGIH and NIOSH); ceiling 0.181 mg/m3 (0.02 ppm)/10 min (NIOSH). . |
Stability: | Reacts with all substances containing active hydrogen, such as acids, amines, water, phenols, mercaptans, amides, urea. Probably moisture sensitive. |
Cosmetics Ingredients Functions | FILM FORMING |
InChI | 1S/C12H18N2O2/c1-11(2)4-10(14-9-16)5-12(3,6-11)7-13-8-15/h10H,4-7H2,1-3H3 |
InChIKey | NIMLQBUJDJZYEJ-UHFFFAOYSA-N |
SMILES | N(=C=O)C1CC(CC(C1)(C)C)(CN=C=O)C |
LogP | 4.75 at 25℃ |
CAS DataBase Reference | 4098-71-9(CAS DataBase Reference) |
EPA Substance Registry System | Isophorone diisocyanate (4098-71-9) |
Safety Information
Hazard Codes | T,N |
Risk Statements | 23-36/37/38-42/43-51/53-22 |
Safety Statements | 26-28-38-45-61 |
OEB | D |
OEL | TWA: 0.005 ppm (0.045 mg/m3), STEL: 0.02 ppm (0.180 mg/m3) [skin] |
RIDADR | UN 2290 6.1/PG 3 |
WGK Germany | 2 |
RTECS | NQ9370000 |
Autoignition Temperature | 430 °C |
TSCA | TSCA listed |
HazardClass | 6.1 |
PackingGroup | III |
HS Code | 29291090 |
Storage Class | 6.1A - Combustible, acute toxic Cat. 1 and 2 |
very toxic hazardous materials | |
Hazard Classifications | Acute Tox. 1 Inhalation |
Aquatic Chronic 2 | |
Eye Irrit. 2 | |
Resp. Sens. 1 | |
Skin Irrit. 2 | |
Skin Sens. 1 | |
STOT SE 3 | |
Hazardous Substances Data | 4098-71-9(Hazardous Substances Data) |
Toxicity | LD50 orally in Rabbit: 4825 mg/kg LD50 dermal Rat > 7000 mg/kg |

Product Application of Isophorone Diisocyanate CAS#4098-71-9
Isophorone diisocyanate (IPDI) is extensively adopted to synthesize high-performance polyurethanes boasting reliable stability, remarkable resistance to yellowing under light exposure and exceptional chemical tolerance. In coating and varnish formulations, it helps boost hardness, flexibility, abrasion resistance, chemical inertness, as well as anti-chalking and anti-weathering properties.
IPDI also serves for producing elastomers intended for castable compounds, sealants, highly pliable textile coatings and rigid industrial topcoats. Furthermore, it finds use in the fabrication of contact lenses and functions as a cross-linking curing agent for diverse polyurethane systems.


