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126-98-7

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126-98-7 Usage

Chemical Properties

Different sources of media describe the Chemical Properties of 126-98-7 differently. You can refer to the following data:
1. CLEAR COLOURLESS TO VERY SLIGHTLY YELLOW LIQUID
2. 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

Different sources of media describe the Uses of 126-98-7 differently. You can refer to the following data:
1. Methylacrylonitrile is used to make coating and elastomers and as an intermediate in the preparation of acids, amine, amides, and esters.
2. 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.
3. In preparation of homopolymers and copolymers; as an intermediate in the preparation of acids, amides, amines, esters, nitriles.

Production Methods

Methyl acrylonitrile can be derived from isobutyraldehyde.

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

Different sources of media describe the Health Hazard of 126-98-7 differently. You can refer to the following data:
1. A lacrimator (causes tearing); an insidious poison which causes delayed skin reactions. Very readily absorbed through skin. Highly toxic.
2. Methylacrylonitrile is a moderate to severe acute toxicant. The degree of toxicity varied with toxic routes and species. Inhalation, ingestion, and skin application on test subjects produced convulsion. Exposure to high concentrations can result in asphyxia and death. The lethal concentrations varied among species from 50 to 400 ppm over a 4- hour exposure period. The clinical symptoms observed in rats suggested a toxic activity of metabolically formed cyanide (Peter and Bolt 1985). This finding was in contrast with acrylonitrile toxicity in the same species, where formation of metabolic cyanide played a minor role. Methylacrylonitrile is a mild skin and eye irritant. However, it is readily absorbed by skin. It showed delayed skin reaction. In mice, the lethal dose from intraperitoneal administration was 15 mg/kg. The oral toxicity due to this compound was also relatively high; an LD50 of 11.6 mg/kg was determined in mice. There is no report of its mutagenic, teratogenic, or carcinogenic actions in animals or humans. 4-Dimethylaminophenol plus sodium thiosulfate or Nacetylcystein was shown to antagonize the acute toxicity of methylacrylonitrile (Peter and Bolt 1985).

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

Check Digit Verification of cas no

The CAS Registry Mumber 126-98-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,2 and 6 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 126-98:
(5*1)+(4*2)+(3*6)+(2*9)+(1*8)=57
57 % 10 = 7
So 126-98-7 is a valid CAS Registry Number.
InChI:InChI=1/C4H5N/c1-4(2)3-5/h1H2,2H3

126-98-7SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 17, 2017

Revision Date: Aug 17, 2017

1.Identification

1.1 GHS Product identifier

Product name Methacrylonitrile

1.2 Other means of identification

Product number -
Other names METHALLYL MERCAPTAN

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:126-98-7 SDS

126-98-7Related news

Oxidative dehydrogenation of isobutyronitrile to Methacrylonitrile (cas 126-98-7) over iron phosphate catalyst09/29/2019

The oxidative dehydrogenation of isobutyronitrile was studied using an iron phosphate with a P/Fe atomic ratio of 1.2 as the catalyst. The main products were methacrylonitrile, acetone, and carbon oxides with a small amount of cyanic acid. The selectivities to methacrylonitrile were about 70 mol...detailed

Polymer reportBulk copolymerization of Methacrylonitrile (cas 126-98-7) with n-alkyl methacrylates: rate of copolymerization and reactivity ratios10/01/2019

The bulk copolymerization of methacrylonitrile with methyl, ethyl and butyl methacrylates, initiated by AIBN under high vacuum, was studied dilatometrically at 60°C. The composition of the reaction medium sensitively affects the overall rate of copolymerization in such a way that a decrease in ...detailed

Thermal degradation of Methacrylonitrile (cas 126-98-7) polymers and copolymers. 2. Copolymers of Methacrylonitrile (cas 126-98-7) and styrene09/27/2019

The thermal degradation of random copolymers of methacrylonitrile and styrene, prepared by free radical polymerisation using azoisobutyronitrile as initiator, has been studied using TG, DTA and TVA. Products obtained in the TVA experiments have been separated and characterised. These copolymers ...detailed

N-vinyl-2-pyrrolidone and Methacrylonitrile (cas 126-98-7) copolymers: nuclear magnetic resonance characterization09/10/2019

The copolymers of N-vinyl-2-pyrrolidone and methacrylonitrile (V/N) were prepared by free radical bulk polymerisation. The copolymer composition was determined from the quantitative 13C{1H} NMR spectrum. The reactivity ratios for N-vinyl-2-pyrrolidone (V) and methacrylonitrile (N) were found to ...detailed

Asymmetric 1,3-dipolar cycloaddition reactions between Methacrylonitrile (cas 126-98-7) and nitrones catalysed by well-defined M(diphosphane) (M = Rh, Ir) complexes09/09/2019

The cationic half-sandwich aqua-complexes [(η5-C5Me5)M(PP∗)(H2O)][SbF6]2 [M = Rh, Ir; PP∗ = (R)-Benphos, (R)-Cyphos, (2R,4R)-Norphos] catalyse the 1,3-dipolar cycloaddition reaction of nitrones with methacrylonitrile with perfect regioselectivity, low-to-perfect endo-selectivity and low-to-mode...detailed

126-98-7Relevant articles and documents

Synthesis and properties of bis(biphenyl)chromium(i) 1,4-di(2- cyanoisopropyl)-1,4-dihydrofulleride and 1-(2-cyanoisopropyl)-1,2- dihydrofullerene

Markin,Shevelev,Domrachev,Fukin,Baranov,Lopatin,Kuropatov,Kirillov,Shavyrin,Kurskii

, p. 1970 - 1974 (2008)

Radical-ion salts bis(biphenyl)chromium(i) 1,4-di(2-cyanoisopropyl)-1,4- dihydrofulleride [(Ph2)2Cr]+?[1,4- (CMe2CN)2C60]-? and bis(biphenyl)chromium(i) 1-(2-cyanoisopropyl)-1,2-

-

Gotkis,Cloke

, p. 2710 (1934)

-

Manganese(I)-Catalyzed H-P Bond Activation via Metal-Ligand Cooperation

Pérez, Juana M.,Postolache, Roxana,Casti?eira Reis, Marta,Sinnema, Esther G.,Vargová, Denisa,De Vries, Folkert,Otten, Edwin,Ge, Luo,Harutyunyan, Syuzanna R.

supporting information, p. 20071 - 20076 (2021/12/03)

Here we report that chiral Mn(I) complexes are capable of H-P bond activation. This activation mode enables a general method for the hydrophosphination of internal and terminal α,β-unsaturated nitriles. Metal-ligand cooperation, a strategy previously not considered for catalytic H-P bond activation, is at the base of the mechanistic action of the Mn(I)-based catalyst. Our computational studies support a stepwise mechanism for the hydrophosphination and provide insight into the origin of the enantioselectivity.

Method for preparing (methyl) acrylonitrile by dehydration of (methyl) acrylamide

-

Paragraph 0025-0093, (2019/12/11)

The invention relates to the field of fine chemical industry, and in particular relates to a method for preparing (methyl) acrylonitrile by dehydration of (methyl) acrylamide. The method for preparingthe (methyl) acrylonitrile by dehydration of secondary catalytic raw material (methyl) acrylamide comprises the following steps: firstly, carrying out dehydration reaction on the (methyl) acrylamidein a homogeneous system, and then carrying out secondary catalytic dehydration reaction in a reaction bed by using a mesoporous organometallic palladium catalyst. The method can reduce the generationof waste water and waste, and has relatively higher (methyl) acrylamide conversion rate and higher (methyl) acrylonitrile single-pass yield. The method has mild reaction conditions, rapid reaction, simple process and easy operation, and is suitable for industrial production.

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