methylenedi-p-phenylene diisocyanate
Methylene diphenyl diisocyanate
CAS: 101-68-8
Molecular Formula: C15H10N2O2
methylenedi-p-phenylene diisocyanate - Names and Identifiers
methylenedi-p-phenylene diisocyanate - Physico-chemical Properties
| Molecular Formula | C15H10N2O2 |
| Molar Mass | 250.25 |
| Density | 1.19 |
| Melting Point | 38-44 °C |
| Boling Point | 392 °C |
| Flash Point | 196 °C |
| Water Solubility | decomposes |
| Solubility | 2g/l (decomposition) |
| Vapor Presure | 0.066 hPa (20 °C) |
| Appearance | neat |
| Specific Gravity | 1.180 |
| Color | White to Almost white |
| Exposure Limit | TLV-TWA 0.051 mg/m3 (0.005 ppm)(ACGIH and NIOSH); ceiling (air) 0.204mg/m3 (0.02 ppm)/10 min (NIOSH andOSHA); IDLH 102 mg/m3 (10 ppm). |
| BRN | 797662 |
| Storage Condition | -20°C |
| Stability | Stable. Combustible. Incompatible with strong oxidizing agents. Reacts violently with alcohols. |
| Sensitive | Moisture Sensitive/Lachrymatory |
| Explosive Limit | 0.4%(V) |
| Refractive Index | 1.5906 (estimate) |
| Physical and Chemical Properties | The trait is a pale yellow molten solid with a strong irritating odor. flash point: 200-218 refractive index: 1.5906 |
| Use | Used in the plastics and rubber industries and as an adhesive |
methylenedi-p-phenylene diisocyanate - Risk and Safety
| Risk Codes | R42/43 - May cause sensitization by inhalation and skin contact. R36/37/38 - Irritating to eyes, respiratory system and skin. R20 - Harmful by inhalation R48/20 - R40 - Limited evidence of a carcinogenic effect |
| Safety Description | S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37 - Wear suitable protective clothing and gloves. S23 - Do not breathe vapour. |
| UN IDs | 2206 |
| WGK Germany | 1 |
| RTECS | NQ9350000 |
| TSCA | Yes |
| HS Code | 29291090 |
| Hazard Note | Toxic/Corrosive/Lachrymatory/Moisture Sensitive |
| Hazard Class | 6.1 |
| Packing Group | II |
| Toxicity | LD50 orally in Rabbit: > 5000 mg/kg LD50 dermal Rabbit > 9000 mg/kg |
methylenedi-p-phenylene diisocyanate - Upstream Downstream Industry
| Raw Materials | Aniline Formaldehyde Chlorine Sodium hydroxide Nitric acid carbon monoxide,cyl. with 10 L (net~3kg) |
| Downstream Products | Polyurethane |
methylenedi-p-phenylene diisocyanate - Reference Information
| freezing point | 37 ℃ |
| (IARC) carcinogen classification | 3 (Vol. 19, Sup 7, 71) 1999 |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Uses | Used in the production of polyurethane elastomers, synthetic fibers, artificial leather, solvent-free coatings, etc. Used in the plastics and rubber industries, and used as adhesives Uses include UV-curable and latent catalyst-containing polymerization composition. |
| category | toxic substances |
| toxicity classification | poisoning |
| acute toxicity | oral-rat LD50: 9200 mg/kg; Oral-mouse LD50: 2200 mg/kg |
| stimulation data | eye-rabbit 100 mg moderate |
| flammability hazard characteristics | open flame is combustible; toxic nitrogen oxide smoke can be released during polymerization |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; Separate storage and transportation from water-containing articles, alcohols and amines |
| fire extinguishing agent | dry powder, carbon dioxide |
| occupational standard | TWA 0.05 mg/m3; STEL 0.2 mg/m3 |
| spontaneous combustion temperature | >600°C |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-threatening and health concentration | 75 mg/m3 |
Last Update：2024-04-10 20:59:58
methylenedi-p-phenylene diisocyanate - Nature
Open Data Verified Data
white solid. Heating stimulates the odor, boiling point 196 C (5 x 133. 3Pa), freezing point 38~39 ℃, relative density (50 ℃/4 ℃)1.19, 1. 5906, viscosity 4.9 × 10-3 Pa -s(50 ℃), flash point (opening) 202 ℃, soluble in acetone, carbon tetrachloride, benzene, chlorobenzene, nitrobenzene, dioxane, etc.
Last Update：2024-01-02 23:10:35
methylenedi-p-phenylene diisocyanate - Preparation Method
Open Data Verified Data
See preparation of 1,5-naphthalene diisocyanate.
Last Update：2022-01-01 10:55:08
methylenedi-p-phenylene diisocyanate - Use
Open Data Verified Data
The product can be widely used in the manufacture of various types of polyurethane elastomers. It is also widely used in the manufacture of artificial leather, synthetic leather, adhesives, coatings, fabric coating finishing agents, human organ substitutes, etc.
Last Update：2022-01-01 10:55:08
methylenedi-p-phenylene diisocyanate - Safety
Open Data Verified Data
- can cause moderate eye irritation and mild skin irritation, can cause skin allergy, the maximum allowable concentration in the air is 0. 02 x 10-6. Due to the active chemical nature of the MDI, it is prevented from direct contact with the skin and splash into the eye during operation, and necessary protective equipment (gloves, protective glasses, work clothes, etc.) is worn.
- 200L galvanized iron drum, 18L tinplate drum. Storage below 5 °c, during storage must ensure that the container is strictly dry sealed and filled with dry nitrogen protection. Once the leakage of water in the container, should not be sealed too tightly, should be left vent, to prevent cracking.
Last Update：2022-01-01 10:55:08
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Raw Materials for methylenedi-p-phenylene diisocyanate
Downstream Products for methylenedi-p-phenylene diisocyanate