Functional Roles
Industries Served
Physical Properties
physical_description
1,1-methylene bis(4-isocyanatocyclohexane) is a clear, colorless to light-yellow liquid. (NIOSH, 2024)
color/form
Clear, colorless to light-yellow liquid
melting_point
less than 14 u00b0F (NIOSH, 2024)
flash_point
greater than 395 u00b0F (NIOSH, 2024)
solubility
Reacts with water (NIOSH, 2024)
density
1.07 at 77 u00b0F (NIOSH, 2024) - Denser than water; will sink
vapor_pressure
0.001 mmHg at 77 u00b0F (NIOSH, 2024)
decomposition
When heated to decomposition it emits tocix fumes of /chlorine/.
polymerization
May slowly polymerize if heated above 122 u00b0F.
refractive_index
Index of refraction = 1.4970 at 20 u00b0C/D
other_experimental_properties
Incompatible with alcohols, amines, bases acids, organotin catalysts; may slowly polymerize if heated above 50 u00b0C; combustible at or above 93.3 u00b0C; freezing point = -10 u00b0C
GHS / SDS Safety
Danger
Acute Toxic
Environmental Hazard
Irritant
Health Hazard
Corrosive
- H319 (96.4%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
- H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]
- H317 (96.4%): May cause an allergic skin reaction [Warning Sensitization, Skin]
- H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
- H315: Causes skin irritation [Warning Skin corrosion/irritation]
- H331: Toxic if inhaled [Danger Acute toxicity, inhalation]
- H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
- H411: Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]
- H330: Fatal if inhaled [Danger Acute toxicity, inhalation]
- H361: Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity]
- H335 (96.2%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
- H317: May cause an allergic skin reaction [Warning Sensitization, Skin]
- H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]
- H330 (27.9%): Fatal if inhaled [Danger Acute toxicity, inhalation]
- H331 (68.5%): Toxic if inhaled [Danger Acute toxicity, inhalation]
- H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
- H334 (96.4%): May cause allergy or asthma symptoms or breathing difficulties if inhaled [Danger Sensitization, respiratory]
- H314: Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
- H315 (96.4%): Causes skin irritation [Warning Skin corrosion/irritation]
- H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled [Danger Sensitization, respiratory]
Chemical Identity
| CAS Number | 5124-30-1 |
| IUPAC Name | 1-isocyanato-4-[(4-isocyanatocyclohexyl)methyl]cyclohexane |
| InChI Key | KORSJDCBLAPZEQ-UHFFFAOYSA-N |
| PubChem CID | 21202 |
| INCI Name | SATURATED METHYLENE DIPHENYL DIISOCYANATE |
Synonyms & Trade Names
Full Description
Hydrogenated MDI (H12MDI) is a cycloaliphatic diisocyanate compound that serves as a crosslinking and curing agent in polymer applications. This material is utilized across coatings & construction, industrial manufacturing, and plastics & polymers industries for its ability to form durable urethane linkages. With a molecular weight of 262.35 and density of 1.07 at 77°F, H12MDI reacts readily with water and provides enhanced UV stability compared to aromatic isocyanates.