hexanedinitrile
1,4-Dicyanobutane
CAS: 111-69-3
Molecular Formula: C6H8N2
hexanedinitrile - Names and Identifiers
hexanedinitrile - Physico-chemical Properties
| Molecular Formula | C6H8N2 |
| Molar Mass | 108.14 |
| Density | 0.951 g/mL at 25 °C (lit.) |
| Melting Point | 1-3 °C (lit.) |
| Boling Point | 295 °C (lit.) |
| Flash Point | 163 °C |
| Water Solubility | 90 g/L (20 ºC) |
| Solubility | 50g/l |
| Vapor Presure | 0.01 mm Hg ( 40 °C) |
| Vapor Density | 3.7 (vs air) |
| Appearance | Liquid |
| Specific Gravity | 0.951 |
| Color | Clear colorless to slightly yellow |
| Exposure Limit | TLV-TWA 18 mg/m3 (4 ppm) (NIOSH). |
| BRN | 1740005 |
| Storage Condition | Store below +30°C. |
| Explosive Limit | 7-14%(V) |
| Refractive Index | n20/D 1.438(lit.) |
| Physical and Chemical Properties | Colorless transparent oily liquid, with slight bitter taste. boiling point 295 ℃ freezing point 1 ℃ relative density 0.9650 refractive index 1.4380 flash point 159 ℃ soluble in methanol, ethanol, chloroform. Insoluble in water, cyclohexane, ether, carbon disulfide and carbon tetrachloride. |
| Use | Used as chromatographic stationary liquid |
hexanedinitrile - Risk and Safety
| Hazard Symbols | T - Toxic |
| Risk Codes | R25 - Toxic if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. R36/38 - Irritating to eyes and skin. R23/25 - Toxic by inhalation and if swallowed. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S39 - Wear eye / face protection. |
| UN IDs | UN 2205 6.1/PG 3 |
| WGK Germany | 1 |
| RTECS | AV2625000 |
| TSCA | Yes |
| HS Code | 29269090 |
| Hazard Class | 6.1 |
| Packing Group | III |
| Toxicity | LD50 orally in Rabbit: 138 mg/kg LD50 dermal Rabbit 2134 mg/kg |
hexanedinitrile - Upstream Downstream Industry
| Raw Materials | Adipic acid |
hexanedinitrile - Nature
Open Data Verified Data
colorless transparent oily liquid, flammable. Slightly bitter taste. Soluble in methanol, ethanol, chloroform. Insoluble in water, cyclohexane, ether, carbon disulfide and carbon tetrachloride. The relative density was 0.9650. Boiling point 295 °c. Freezing point 1 ℃. Flash point (closed cup) 159 °c. Refractive index 4380. Adipic acid is generated during hydrolysis and hexamethylene diamine is generated during reduction.
Last Update：2025-06-10 22:55:16
hexanedinitrile - Preparation Method
Open Data Verified Data
- Amidation of adipic acid the reaction of adipic acid and excess ammonia in the presence of the catalyst phosphoric acid or its salts or esters is carried out at a temperature of 270~290 °c to produce diammonium adipate, then, the crude adiponitrile is produced by heating and dehydration, and the product is obtained by distillation.
- acrylonitrile electrolytic dimerization method acrylonitrile solution electrolysis the cathode region was separated from the anode region by a cation exchange membrane, the anode liquid was diluted sulfuric acid, and the cathode liquid was an acrylonitrile solution. Its concentration is 25% ~ 40%. The pH value of the Catholyte is maintained at 7-9.5, and acrylonitrile is Bis-polymerized into adiponitrile by electrolytic reduction, and the finished product is obtained by rectification.
Last Update：2022-01-01 10:37:03
hexanedinitrile - Application
Open Data Verified Data
This product is used for the preparation of polyamide fiber intermediate hexamethylene diamine, rubber accelerator and rust inhibitor. Also used as detergent additives, acrylonitrile, methyl acrylonitrile and methyl methacrylate Ternary Polymer spinning solvent, polyvinyl chloride fiber wet spinning and dry spinning solvent, polyamide colorant, fabric bleaching agent, and used as acetate, plasticizers for propionate, butyrate and mixed esters.
Last Update：2025-08-19 16:24:40
hexanedinitrile - Safety
Open Data Verified Data
This product is toxic, through oral inhalation or skin absorption can cause poisoning. The LD50 of mice was 38. 8 mg/kg, and the LD50 of rats was 154. 8 mg/kg. Effect on the skin, to the guinea pig with this product to wipe the skin, after 3, 4 to 16 times after the application, some animals died. The maximum allowable concentration in air is 15~20mg/m3. Human chronic poisoning can cause leukopenia and mononuclear leukocytosis. If you inhale adiponitrile vapor or accidentally swallow a few milliliters of adiponitrile, it can cause Nausea, Vomit, mucous membrane irritation and dizziness. The victim should be immediately sent to hospital for treatment, injection of sodium thiosulfate and other drugs, to restore normal cardiopulmonary organ activity. In case of Dyspnea, the pulse is accelerated, the consciousness is blurred, the blood pressure is obviously lowered, the limb facial tissue numbness or convulsion, must be oxygen. If contact with the eyes, the application of a large number of water for 20 minutes, and then sent to the hospital for treatment. If in contact with the skin, wash with soap and water. The production workshop should be well ventilated and the equipment should be closed. The operator should wear protective gear. See acrylonitrile for Protection Measure.
This product is packaged in an iron drum, 200kg per barrel, and is stored and transported according to the provisions of flammable drugs.
Last Update：2022-01-01 10:37:04
hexanedinitrile - Reference Information
| freezing point | 1 ℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | adiponitrile is an organic compound having the molecular formula (CH2)4(CN)2. It is a viscous, colorless liquid that is an important precursor of the polymer nylon 66. In, its production capacity can reach 0.1 billion. |
| Application | The dinitrile is mainly used for the production of polyamide fiber intermediate diamine, rubber accelerator and rust inhibitor, also used as detergent additives, acrylonitrile, methyl acrylonitrile and methyl methacrylate Ternary Polymer spinning solvent, polyvinyl chloride fiber wet spinning and dry spinning solvent, polyamide colorant, fabric bleaching agent, acetate, propionate, butyric acid ester and mixed Ester plasticizer; And as an extractant for aromatic extraction, etc. used as chromatographic stationary liquid |
| production method | at present, the main method for the industrial production of dinitriles is the ammoniation of adipic acid, butadiene method and acrylonitrile dimerization method, which has been the earliest industrialization of amidation, technology is relatively mature, the largest application. 1. Amidation of adipic acid adipic acid and excess ammonia in the presence of the catalyst phosphoric acid or its salts or esters, at a temperature of 270-290 ° C. Reaction, the formation of diammonium adipate, and then heating dehydration, crude adiponitrile, the product was obtained by distillation. Raw material consumption quota: Adipic acid 1606kg/t, liquid ammonia 370kg/t, sodium hydroxide 36kg/t. The butadiene method is also divided into chlorination and direct hydrocyanation. 3. Acrylonitrile electrolytic dimerization method the electrolyte is p-toluene tetraethylamine sulfonate, temperature 50-60 ℃, has two nitrile yield 92-95%. The hydrogenation dimerization of acrylonitrile can also be carried out by using a gas phase catalytic hydrogenation method using ruthenium catalyst at 200-300 ° C. And 0.1-0.3MPa. Raw material consumption quota: acrylonitrile 1100kg/t, sulfuric acid 80kg/t. |
| category | toxic substances |
| toxicity grade | high toxicity |
| Acute toxicity | oral-rat LD50:155 mg/kg; Oral-mouse LD50:172 mg/kg |
| flammability hazard characteristics | open flame flammability; High thermal decomposition; Interaction with oxidant; combustion releases toxic nitrogen oxides and cyanide fumes |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature, separate storage of food additives |
| extinguishing agent | dry powder, foam, carbon dioxide, sand. |
| Occupational Standard | TWA 4 PPM; Tel 10 mg/m3 |
| spontaneous combustion temperature | 460°C |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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Raw Materials for hexanedinitrile