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Methacrylic acid

Product Name
Methacrylic acid
CAS No.
79-41-4
Chemical Name
Methacrylic acid
Synonyms
GE110;FX668F;ai3-15724;Loctite3298;CH2=C(CH3)COOH;Methacrylsαure;Metacrilic Acid;acidometacrilico;METHACRYLIC ACID;METAACRYLIC ACID
CBNumber
CB9240023
Molecular Formula
C4H6O2
Formula Weight
86.09
MOL File
79-41-4.mol
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Methacrylic acid Property

Melting point:
12-16 °C (lit.)
Boiling point:
163 °C (lit.)
Density 
1.015 g/mL at 25 °C (lit.)
vapor density 
>3 (vs air)
vapor pressure 
1 mm Hg ( 20 °C)
refractive index 
n20/D 1.431(lit.)
Flash point:
170 °F
storage temp. 
Store at +15°C to +25°C.
pka
pK1:4.66 (25°C)
form 
Liquid
color 
Clear
Odor
Repulsive
PH
2.0-2.2 (100g/l, H2O, 20℃)
explosive limit
1.6-8.7%(V)
Water Solubility 
9.7 g/100 mL (20 ºC)
Sensitive 
Moisture & Light Sensitive
Merck 
14,5941
BRN 
1719937
Exposure limits
TLV-TWA 20 ppm (~70 mg/m3) (ACGIH).
Stability:
May be stabilized by the addition of MEHQ (Hydroquinone methyl ether, ca. 250 ppm) or hydroquinone. In the absence of a stabilizer this material will readily polymerize. Combustible. Incompatible with strong oxidizing agents, hydrochloric acid.
InChIKey
CERQOIWHTDAKMF-UHFFFAOYSA-N
CAS DataBase Reference
79-41-4(CAS DataBase Reference)
NIST Chemistry Reference
2-Propenoic acid, 2-methyl-(79-41-4)
EPA Substance Registry System
Methacrylic acid (79-41-4)
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Safety

Hazard Codes 
C
Risk Statements 
21/22-35-37-20/21/22
Safety Statements 
26-36/37/39-45
RIDADR 
UN 2531 8/PG 2
WGK Germany 
1
RTECS 
OZ2975000
Autoignition Temperature
752 °F
TSCA 
Yes
HS Code 
2916 13 00
HazardClass 
8
PackingGroup 
II
Hazardous Substances Data
79-41-4(Hazardous Substances Data)
Toxicity
LD50 orally in Rabbit: 1320 mg/kg
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H227Combustible liquid

H302Harmful if swallowed

H311Toxic in contact with skin

H314Causes severe skin burns and eye damage

H332Harmful if inhaled

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
8.00578
Product name
Methacrylic acid
Purity
(stabilised with hydroquinone monomethyl ether) for synthesis
Packaging
100 mL
Price
$30.71
Updated
2021/03/22
Sigma-Aldrich
Product number
8.00578
Product name
Methacrylic acid
Purity
(stabilised with hydroquinone monomethyl ether) for synthesis
Packaging
500 mL
Price
$40.24
Updated
2021/03/22
Sigma-Aldrich
Product number
8.00578
Product name
Methacrylic acid
Purity
(stabilised with hydroquinone monomethyl ether) for synthesis
Packaging
2.5 L
Price
$88.06
Updated
2021/03/22
Sigma-Aldrich
Product number
155721
Product name
Methacrylic acid
Purity
contains 250 ppm MEHQ as inhibitor, 99%
Packaging
2kg
Price
$141
Updated
2021/03/22
Sigma-Aldrich
Product number
155721
Product name
Methacrylic acid
Purity
contains 250 ppm MEHQ as inhibitor, 99%
Packaging
3kg
Price
$173
Updated
2021/03/22
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Methacrylic acid Chemical Properties,Usage,Production

Description

Methacrylic acid, abbreviated MAA, is an organic compound. This colourless, viscous liquid is a carboxylic acid with an acrid unpleasant odor. It is soluble in warm water and miscible with most organic solvents. Methacrylic acid is produced industrially on a large scale as a precursor to its esters, especially methyl methacrylate (MMA) and poly(methyl methacrylate) (PMMA). The methacrylates have numerous uses, most notably in the manufacture of polymers with trade names such as Lucite and Plexiglas. MAA occurs naturally in small amounts in the oil of Roman chamomile.

Chemical Properties

Methacrylic acid is a colorless liquid.

Chemical Properties

colourless liquid or crystals with an unpleasant odour.

Uses

Monomer for large-volume resins and polymers, organic synthesis. Many of the polymers are based on esters of the acid, as the methyl, butyl, or isobutyl esters.

Uses

Methacrylic acid is used in the manufactureof methacrylate resins and plastics.

Uses

Manufacture of methacrylic resins and plastics

Production Methods

More than 3 million tons of methyl methacrylate (MMA) are produced annually. In one route, acetone cyanohydrin is converted to methacrylamide sulfate using sulfuric acid. That compound is hydrolyzed to methacrylic acid, or it can be converted into methyl methacrylate in one step. In the second route, isobutylene or tertbutanol are oxidized to methacrolein, then methacrylic acid.Methacrolein for this purpose can also be obtained from formaldehyde and ethylene. Isobutyric acid can also be dehydrogenated to methacrylic acid.
Methacrylic acid was first obtained in the form of its ethyl ester by treating phosphorus pentachloride with oxyisobutyric ester.[2] It is, however, more readily obtained by boiling citra- or mesobrompyrotartaric acids with alkalis. It crystallizes in prisms. When fused with an alkali, it forms propanoic acid. Sodium amalgam reduces it to isobutyric acid. A polymeric form of methacrylic acid was described in 1880.

Definition

ChEBI: An alpha,beta-unsaturated monocarboxylic acid that is acrylic acid in which the hydrogen at position 2 is substituted by a methyl group.

General Description

A clear colorless liquid (or low-melting solid) with a pungent odor. Corrosive to metals and tissue. Flash point 170°F. Melting point 61°F. May polymerize exothermically if heated or contaminated. If the polymerization takes place inside a container, the container may rupture violently. Less dense than water. Vapors heavier than air. Used to make plastics.

Air & Water Reactions

Soluble in water.

Reactivity Profile

Methacrylic acid reacts with strong oxidizing agents. Presents a storage hazard: violent exothermic polymerizations leading to explosion can occur spontaneously, particularly at low inhibitor or stabilizer concentrations [Anon., CISHC Chem. Safety Summ., 1979, 50, p. 34; Bond, J., Loss Prev. Bull., 1991, 101, p. 1].

Hazard

Toxic material. Strong irritant to eyes and skin. Questionable carcinogen.

Health Hazard

INHALATION: Severe irritation to respiratory tract. EYES: Short contact can cause severe damage. SKIN: Causes severe irritation and burns. Ingestion: High hazard - may cause death or permanent injury on short exposure to small quantities. OTHER: May affect blood pressure temporarily.

Health Hazard

Methacrylic acid is a highly corrosive liquid.Contact with eyes can result in blindness.Skin contact may produce burns. No inhalation toxicity was observed in rats. Exposureto its vapors may produce skin and eye irritation, which can be mild to moderate. Adermal LD50 value in rabbits is 500 mg/kg.

Fire Hazard

Combustible liquid; flash point (open cup) 76°C (170°F); vapor pressure <0.1 torr at 20°C (68°F). Fire-extinguishing agent: water spray, “alcohol” foam, dry chemical, or CO2; use a water spray to dilute and flush the spill and to disperse the vapors.
Methacrylic acid polymerizes readily. The reaction is exothermic. The rate of reaction accelerates on heating, which may result in violent rupture of closed containers. The polymerization may be inhibited with a trace quantity of hydroquinone and hydroquinone monomethyl ether (Aldrich 2006). The acid may be stored safely below its melting point.

Safety Profile

Poison by intraperitoneal route. Moderately toxic by ingestion and skin contact. Corrosive to skin, eyes, and mucous membranes. Mutation data reported. Flammable when exposed to heat, flame, or oxidizers. A storage hazard; exothermic polymerization may occur spontaneously. To fight fire, use alcohol foam, spray, mist, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes.

Potential Exposure

Methacrylic acid is used in preparation of methacrylates and carboxylated polymers; in the production of the material or its alkyl esters, as monomers or comonomers for synthetic resins for the production of plastic sheets, moldings, and fibers.

Carcinogenicity

Methacrylic acid was considered by the IARC Working Groups, but monographs were not prepared because adequate data on its carcinogenicity were not available. The IUCLID database reports a dermal application study (dose unspecified) of mice treated three times per week for 4 months and then observed for their lifetimes. No excess dermal tumors were observed.

Shipping

UN2531 Methacrylic acid, stabilized, Hazard class: 8; Labels: 8-Corrosive material.

Purification Methods

Aqueous methacrylic acid (90%) is saturated with NaCl (to remove the bulk of the water), then the organic phase is dried with CaCl2 and distilled under vacuum. Polymerisation inhibitors should be added to the distillate and include 0.25% p-methoxyphenol, 0.1% hydroquinone, or 0.05% N,N'-diphenyl-p-phenylenediamine. [Beilstein 2 IV 1518.]

Incompatibilities

Vapor may form explosive mixture with air. A reducing agent; incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Aqueous solution is strongly acidic: incompatible with strong acids; caustics, ammonia, amines, isocyanates, alkylene oxides; epichlorohydrin. Will polymerize readily from heating above 59F/15C, or due to the presence of light, oxidizers (e.g., peroxides); or in the presence of traces of hydrochloric acid, with fire or explosion hazard. Attacks metals. Note: Typically contains 100 ppm of monomethyl ether hydroquinone (150-76-5) as an inhibitor to prevent polymerization

Waste Disposal

Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.

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Methacrylic acid Suppliers

Shandong chuangying chemical co., ltd
Tel
1558-9901131-
Email
2235633711@qq.com
Country
China
ProdList
180
Advantage
58
Wuhan Permanent-Rich Technology Co.,LTD
Email
2242508613@qq.com
Country
China
ProdList
7135
Advantage
58
Nanjing Sincerity Chemical Co. Ltd.
Tel
025-82223911-
Email
hp@njsincerity.com
Country
China
ProdList
180
Advantage
58
Jinan Yuanxiang Chemical Co., Ltd
Tel
0531-18853181-302
Email
1172572171@qq.com
Country
China
ProdList
157
Advantage
58
J & K SCIENTIFIC LTD.
Tel
010-82848833- ;010-82848833-
Fax
86-10-82849933
Email
jkinfo@jkchemical.com;market6@jkchemical.com
Country
China
ProdList
96815
Advantage
76
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
21-61259100-
Fax
86-21-61259102
Email
sh@meryer.com
Country
China
ProdList
40264
Advantage
62
Alfa Aesar
Tel
400-610-6006; 021-67582000
Fax
021-67582001/03/05
Email
saleschina@alfa-asia.com
Country
China
ProdList
30159
Advantage
84
TCI (Shanghai) Development Co., Ltd.
Tel
021-67121386 / 800-988-0390
Fax
021-67121385
Email
Sales-CN@TCIchemicals.com
Country
China
ProdList
24555
Advantage
81
Beijing dtftchem Technology Co., Ltd.
Tel
010-60275820-
Fax
010-60270825
Email
elainezt@sina.com
Country
China
ProdList
1401
Advantage
62
Energy Chemical
Tel
021-58432009-
Fax
021-58436166
Email
sales8178@energy-chemical.com
Country
China
ProdList
43504
Advantage
61
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View Lastest Price from Methacrylic acid manufacturers

Shanghai Longyu Biotechnology Co., Ltd.
Product
Methacrylic acid 79-41-4
Price
US $1.00/g
Min. Order
1g
Purity
99
Supply Ability
20tons
Release date
2021-12-04
Wuhan Mulei New Material Technology Co. Ltd
Product
Methacrylic acid 79-41-4
Price
US $10.00/KG/Tin
Min. Order
1KG
Purity
99%
Supply Ability
5000tons per month
Release date
2021-04-06
Hebei Crovell Biotech Co Ltd
Product
Methacrylic acid 79-41-4
Price
US $10.50/KG
Min. Order
1KG
Purity
99%
Supply Ability
10 ton
Release date
2021-06-30

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