Item

Specific Information

Identification

Chemical name : Azobisisobutyronitrile
Synonymous names : AIBN,

Azobisisobutyronitrile,2,2'-Azobis(2-methylpropionitrile)

Molecular Formula: C₈H₁₂N₄
Molecular Weight: 164.21
CAS Number: 78-67-1

Dangerous Specification Number: 41040

Physical and Chemical Properties

Appearance: White transparent crystals
Solubility: Insoluble in water, soluble in ethanol, ether, toluene, etc.
Melting Point: 110°C (with decomposition)

Hazardous Attributes

Flammability: Flammable
Combustion Decomposition Products: Including carbon monoxide, carbon dioxide, cyanides, nitrogen oxides, nitrogen, etc.
Flash - Point Data: No data available
Polymerization: Does not polymerize
Lower Explosive Limit: No relevant data available
Stability: Stable
Upper Explosive Limit: No relevant data available
Maximum Explosion Pressure: No relevant data available
Ignition Temperature: No relevant data available
Hazardous Characteristics: When exposed to high heat, open flames, or mixed with oxidants, there is a risk of combustion and explosion due to friction and impact. Toxic gases will be released during combustion. It is unstable when heated. Decomposition begins gradually at 40°C and occurs violently at 103 - 104°C, releasing nitrogen and a variety of organic cyanides, which are harmful to the human body, emit a large amount of heat, and may cause an explosion.

Toxicity

Median Lethal Dose LD₅₀: 25 - 30mg/kg (oral administration to rats); 17.2 - 25mg/kg (oral administration to mice)

Harm to the Human Body

Routes of Invasion: Can enter the human body through inhalation, ingestion, and skin absorption
Harmful Manifestations: Can release cyanide ions in the body, leading to poisoning. Those who are in large - scale contact may experience symptoms such as headache, head swelling, fatigue, salivation, and difficulty in breathing; coma and convulsions may also occur. The volatile substances generated during the heating or cutting of foamed plastics using this product as a blowing agent will irritate the throat, cause a bitter taste in the mouth, and may lead to vomiting and abdominal pain. The decomposition of this product can produce highly toxic methylene succinonitrile. Long - term exposure may cause neurasthenic syndrome, respiratory tract irritation symptoms, and liver and kidney damage.

First - Aid Measures

Skin Contact: Immediately remove the contaminated clothing, thoroughly wash the skin with soapy water or clean water, and then seek medical attention in a timely manner
Eye Contact: Lift the eyelids, rinse with flowing water or normal saline, and then seek medical attention as soon as possible
Inhalation: Quickly transfer the patient to a place with fresh air. Keep the respiratory tract unobstructed. If there is difficulty in breathing, give oxygen. If breathing stops, immediately perform artificial respiration and then send the patient to the hospital
Ingestion: Let the patient drink plenty of warm water, induce vomiting, and wash the stomach with a 1:5000 potassium permanganate solution or a 5% sodium thiosulfate solution

Protection Measures

Engineering Control: Adopt a closed - operation mode and carry out local exhaust ventilation
Respiratory Protection: Wear a filter - type dust - proof respirator when there is a possibility of contact with toxic substances. In case of emergency rescue or evacuation, it is recommended to wear a self - contained breathing apparatus
Eye Protection: Wear safety goggles
Body Protection: Wear a breathable anti - toxic suit
Hand Protection: Wear anti - toxic permeation gloves
Other Protections: Take a shower and change clothes after work. Store the clothes contaminated by toxic substances separately and use them after washing