Methacrylonitrile
- CAS No.
- 126-98-7
- Chemical Name:
- Methacrylonitrile
- Synonyms
- Methylacrylonitrile;1-Methylethenyl Cyanide;2-METHYL-2-PROPENENITRILE;NSC 24145;usafst-40;USAF st-40;CH2C(CH3)CN;2-Cyanopropene;Isobutenenitrile;Methacrylnitrile
- CBNumber:
- CB0271415
- Molecular Formula:
- C4H5N
- Molecular Weight:
- 67.09
- MOL File:
- 126-98-7.mol
- Modify Date:
- 2024/3/14 15:18:25
| Melting point | −35.8 °C(lit.) |
|---|---|
| Boiling point | 90-92 °C(lit.) |
| Density | 0.8 g/mL at 25 °C(lit.) |
| vapor pressure | 64 mm Hg ( 20 °C) |
| refractive index |
n |
| Flash point | 54 °F |
| storage temp. | 2-8°C |
| solubility | Chloroform, Ethyl Acetate (Slightly), Methanol (Slightly) |
| form | Colorless liquid |
| color | Colourless |
| Odor Threshold | 3ppm |
| Water Solubility | 2.57 g/100 mL (20 ºC) |
| Merck | 13,5968 |
| Exposure limits | TLV-TWA skin 2.7 mg/m3 (1 ppm) (ACGIH). |
| LogP | 0.76 |
| CAS DataBase Reference | 126-98-7(CAS DataBase Reference) |
| NIST Chemistry Reference | 2-Propenenitrile, 2-methyl-(126-98-7) |
| EPA Substance Registry System | Methacrylonitrile (126-98-7) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |   GHS02,GHS06 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H225-H301-H311-H317-H331 | |||||||||
| Precautionary statements | P210-P233-P240-P241-P242-P243-P280-P303+P361+P353-P370+P378-P403+P235-P501-P264-P270-P301+P310-P321-P330-P405-P501-P280-P302+P352-P312-P322-P361-P363-P405-P501-P261-P272-P280-P302+P352-P333+P313-P321-P363-P501-P261-P271-P304+P340-P311-P321-P403+P233-P405-P501 | |||||||||
| Hazard Codes | F,T | |||||||||
| Risk Statements | 11-23/24/25-43 | |||||||||
| Safety Statements | 9-16-18-29-45 | |||||||||
| RIDADR | UN 3079 3/PG 1 | |||||||||
| OEB | B | |||||||||
| OEL | TWA: 1 ppm (3 mg/m3) [skin] | |||||||||
| WGK Germany | 1 | |||||||||
| RTECS | UD1400000 | |||||||||
| HazardClass | 3.1 | |||||||||
| PackingGroup | I | |||||||||
| HS Code | 29269095 | |||||||||
| Toxicity | LD50 orally in rats: 0.25 ml/kg (Smyth) | |||||||||
| IDLA | 4.0 ppm | |||||||||
| NFPA 704 |
|
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Methacrylonitrile Chemical Properties,Uses,Production
Chemical Properties
Methylacrylonitrile is a colorless liquid with an odor like bitter almonds. It is reported that methacrylonitrile cannot be detected by its smell even at concentrations which are already dangerous for humans. Hence, special attention must be given to ventilation and estimations of the amount of poison present must be carried out frequently.
Uses
This study reports the toxicity and metabolism of Methacrylonitrile (MeAN) in normal male Sprague-Dawley rats and those pre-treated with caffeine, alcohol or both. These results suggest that caffeine inhibited and alcohol enhanced toxicity and metabolism of MeAN.
Production Methods
1.Methyl acrylonitrile can be derived from isobutyraldehyde.
2.Methacrylonitrile can be produced by ammoxidation of isobutene. Its copolymerization
with methacrylic acid gives poly (methacrylimide), an engineering plastic commercialized
under the trade name Rohacell by R€ohm (Federal
Republic of Germany) .
General Description
A clear colorless liquid. Less dense than water. Flash point 55°F. Boiling point 195°F. Very be toxic by ingestion, inhalation and skin absorption. Used to make plastics and coatings.
Air & Water Reactions
Highly flammable. Soluble in water.
Reactivity Profile
METHACRYLONITRILE is a colorless, flammable, toxic liquid. Explosive in the form of vapor when exposed to heat, flame or sparks. When heated to decomposition Methacrylonitrile emits toxic fumes of nitrile and oxides of nitrogen [Lewis, 3rd ed., 1993, p. 829].
Hazard
Flammable. Toxic by ingestion, inhalation, and skin absorption.
Health Hazard
A lacrimator (causes tearing); an insidious poison which causes delayed skin reactions. Very readily absorbed through skin. Highly toxic.
Fire Hazard
Methacrylonitrile evolves flammable concentrations of vapor at temperatures down to 55.04F. Thus, at room temperatures, flammable concentrations are liable to be present. Toxic fumes of nitrogen oxides are released when the material burns. Also, the chemical will explode due to its tendency to polymerize violently. Avoid heat. Hazardous polymerization may occur.
Safety Profile
Poison by ingestion, inhalation, skin contact, and intraperitoneal routes. An eye irritant. A dangerous fire hazard when exposed to heat, flame, or sparks. When heated to decomposition it emits toxic fumes of NOx and CN-. See also NITRILES.
Potential Exposure
This material is used as a monomer in the preparation of polymeric coatings and elastomers
Shipping
UN3079 Methacrylonitrile, stabilized, Labels: 6.1; Hazard class: 6.1, 3-Flammable liquid, Inhalation Hazard Zone B.
Purification Methods
Wash it with saturated aqueous NaHSO3 (to remove inhibitors such as p-tert-butylcatechol), 1% NaOH in saturated NaCl and then with saturated NaCl. Dry it with CaCl2 and fractionally distil it under nitrogen to separate it from impurities such as methacrolein and acetone. [Beilstein 2 IV 1539.]
Incompatibilities
May form explosive mixture with air. Methacrylonitrile evolves flammable concentrations of vapor at temperatures down to 12.8C. Thus, at room temperatures, flammable concentrations are liable to be present. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides, aliphatic amines, alkanolamines, alkali, and light. Heat sensitive; polymerization may occur due to elevated temperature, visible light, or contact with a concentrated alkali. Note: Typically contains 50 pm of monoethyl ether hydroquinone (662-62-8) as an inhibitor to prevent polymerization.
Waste Disposal
Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform to EPA regulations governing storage, transportation, treatment, and waste disposal. Add alcoholic NaOH, then oxidize with sodium hypochlorite. After reaction, flush to sewer with water
Methacrylonitrile Preparation Products And Raw materials
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