Methacrylic acid
Methacrylic acid
CAS: 79-41-4
Molecular Formula: C4H6O2
Methacrylic acid - Names and Identifiers
| Name | Methacrylic acid |
| Synonyms | Methacrylic acid Methlacrylic Acid Methylacrylic Acid 2-Methylacrylic acid α-Methylacrylic acid 2-Methylpropenoic acid 2-methyl-2-Propenoicacid 2-Methyl-2-propenoic acid .alpha.-Methylacrylicacid Methacrylic acid, stabilized, extra pure Methacrylic Acid, Stab. With 250Ppm 4-Methoxyphenol |
| CAS | 79-41-4 |
| EINECS | 201-204-4 |
| InChI | InChI=1/C4H6O2/c1-3(2)4(5)6/h1H2,2H3,(H,5,6) |
| InChIKey | CERQOIWHTDAKMF-UHFFFAOYSA-N |
Methacrylic acid - Physico-chemical Properties
| Molecular Formula | C4H6O2 |
| Molar Mass | 86.09 |
| Density | 1.015 g/mL at 25 °C (lit.) |
| Melting Point | 12-16 °C (lit.) |
| Boling Point | 163 °C (lit.) |
| Flash Point | 170°F |
| Water Solubility | 9.7 g/100 mL (20 ºC) |
| Vapor Presure | 1 mm Hg ( 20 °C) |
| Vapor Density | >3 (vs air) |
| Appearance | Liquid |
| Color | Clear |
| Odor | Repulsive |
| Exposure Limit | TLV-TWA 20 ppm (～70 mg/m3) (ACGIH). |
| Merck | 14,5941 |
| BRN | 1719937 |
| pKa | pK1:4.66 (25°C) |
| PH | 2.0-2.2 (100g/l, H2O, 20℃) |
| Storage Condition | Store at +15°C to +25°C. |
| 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. |
| Sensitive | Moisture & Light Sensitive |
| Explosive Limit | 1.6-8.7%(V) |
| Refractive Index | n20/D 1.431(lit.) |
| Physical and Chemical Properties | Character: colorless transparent liquid at room temperature. melting point 14 ℃ boiling point 159~163 ℃ relative density 1.0153 refractive index 1.4314 flash point 77 ℃ solubility, ethanol and most organic solvents. |
| Use | Used in the manufacture of coatings, insulating materials, adhesives and ion exchange resins |
Methacrylic acid - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | R21/22 - Harmful in contact with skin and if swallowed. R35 - Causes severe burns R37 - Irritating to the respiratory system R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 2531 8/PG 2 |
| WGK Germany | 1 |
| RTECS | OZ2975000 |
| TSCA | Yes |
| HS Code | 2916 13 00 |
| Hazard Class | 8 |
| Packing Group | II |
| Toxicity | LD50 orally in Rabbit: 1320 mg/kg |
Methacrylic acid - Upstream Downstream Industry
| Raw Materials | Acetone cyanohydrin Sulfuric acid |
| Downstream Products | Glycidyl methacrylate Isobutyryl chloride |
Methacrylic acid - Nature
Open Data Verified Data
A colorless transparent liquid at room temperature. Melting Point 14 °c. Boiling point 159~163 deg C (look kPa). The relative density was 1. 0153. Flash point 77 °c. Viscosity 1.3mPa.s. Refractive index 4314. Soluble in hot water, ethanol and most organic solvents. Easy to polymerize. It can form explosive mixture with air, and the explosion limit is 2.1% ~ l 2.5%.
Last Update：2025-06-10 22:55:16
Methacrylic acid - Preparation Method
Open Data Verified Data
- acetone cyanohydrin method acetone and hydrocyanic acid are reacted in the presence of an alkali catalyst to generate acetone cyanohydrin, and then reacted with concentrated sulfuric acid to generate methacrylamide sulfate, which is then hydrolyzed to generate methacrylic acid. Acetone cyanohydrin and sulfuric acid are required to contain no water in the production, otherwise acetone or methyl isobutyrate will be left in the product, which will affect the quality of the product.
- isobutylene oxidation isobutylene is oxidized in two steps, methacrolein is generated in the first step, methacrylic acid is generated in the second step, and then a qualified product is obtained by rectification. Tert-butanol may also be used instead of isobutene.
- the hydrolysis method of methacrylonitrile is obtained by using isobutylene as a raw material through ammonia oxygen and hydrolysis.
- methacrolein is prepared by isobutane oxidation through oxidation, and then obtained by oxidation.;
Last Update：2022-01-01 10:31:18
Methacrylic acid - Application
Open Data Verified Data
important organic chemical raw materials and polymer intermediates. Its most important derivatives of methyl methacrylate production of organic glass can be used in aircraft and civil building windows, can also be processed into buttons, solar filters and automotive light lenses; the produced coating has superior suspension, Rheology and durability properties; The prepared binder can be used for the adhesion of metal, leather, plastic and building materials; Methacrylate polymer emulsion is used as fabric finishing agent and antistatic agent. In addition, methacrylic acid can also be used as a raw material for synthetic rubber.
Last Update：2025-08-19 16:24:40
Methacrylic acid - Safety
Open Data Verified Data
- This product has moderate toxicity, strong irritation to the skin and mucous membranes, rats by mouth ld508400 mg/kg. But found no carcinogenic phenomenon. The allowable limit concentration in the workplace is 100 × 10-6 (temporary working area). Good ventilation conditions are required in the production workshop, and the operator should wear protective equipment, especially protective goggles. Rinse with plenty of water when touching the skin.
- packed in polyethylene-lined aluminum or glass and stainless steel containers with a net weight of 200kg. The storage period is about three months. When thawing, the thawing temperature should be about 25 ° C at room temperature, and it can be used after complete melting and mixing. The hazardous materials shall be stored and transported according to the regulations.
Last Update：2022-01-01 10:31:18
Methacrylic acid - Reference Information
| LogP | 0.93 at 22℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | methacrylic acid is an important chemical raw material, which has two functional groups of carbon-carbon double bond and carboxylic acid group, thus, polymerization, esterification and the like can be carried out. It can be used for the preparation of methyl methacrylate, coatings, synthetic rubber, adhesives, fabric treatment agents, resins, polymer additives and functional polymer materials. |
| Application | used in the manufacture of coatings, insulating materials, binders and ion exchange resins important organic chemical raw materials and polymer intermediates. Its most important derivatives of methyl methacrylate production of organic glass can be used in aircraft and civil building windows, can also be processed into buttons, solar filters and automotive light lenses; the coatings produced have superior suspension, Rheology and durability properties; The resulting binders are useful for bonding metals, leather, plastics and building materials; And the methacrylate polymer emulsions are used as fabric finishes and antistatic agents. In addition, methacrylic acid can also be used as a raw material for synthetic rubber. use as an organic reagent production of resins, plastics, high-molecular polymers, and production of esters. |
| production method | There are two main industrial production methods of methacrylic acid, that is, acetone cyanohydrin method is isobutylene (tert-butyl alcohol) oxidation method. 1. Acetone cyanohydrin method acetone and hydrocyanic acid in the presence of alkali catalyst, reaction to generate acetone cyanohydrin, and then react with concentrated sulfuric acid to generate methacrylamide sulfate, and then by hydrolysis to generate methacrylic acid. Acetone cyanohydrin and sulfuric acid are required to contain no water in the production, otherwise acetone or α-hydroxyisobutyrate will be produced and remain in the product, which will affect the product quality. The production of methacrylic acid by acetone cyanohydrin method consumes 898kg of sodium cyanide (>87%), 1100kg of acetone (98.5%) and 4080kg of sulfuric acid (fuming) per ton of product. 2. Isobutylene (tert-butyl alcohol) oxidation isobutylene is oxidized in two steps, the first step generates methacrolein, the second step generates methacrylic acid, and then the qualified product is obtained by distillation. Methacrylonitrile hydrolysis method with isobutylene as raw material, ammonia oxygen, hydrolysis and derived. 4. Isobutane oxidation by oxidation of methacrolein, and then obtained by oxidation. |
| category | corrosive article |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LC50: 1060 mg/kg; Oral-mouse LD50: 1250 mg/kg |
| explosive hazard characteristics | explosive when mixed with air; in the container high temperature easy polymerization Fever cause explosion |
| flammability hazard characteristics | flammable; Spicy and irritating smoke emitted from fire scene |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from oxidants and alkalis. |
| fire extinguishing agent | water mist, carbon dioxide, foam, dry powder |
| Occupational Standard | TLV-TWA 70 mg/m3; TWA 100 mg/m3 |
| spontaneous combustion temperature | 752 ° F. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 02:00:11
Supplier List
Spot supply
Product Name: Methacrylic acid Visit Supplier Webpage Request for quotationCAS: 79-41-4
Tel: 15662672320
Email: 2360124261@qq.com
Mobile: 15662672320
QQ: 2360124261
Wechat: 15662672320
WhatsApp: 15662672320
Spot supply
Product Name: Methacrylic acid Request for quotationCAS: 79-41-4
Tel: 021-60556179
Email: 18721521379@163.com
Mobile: +86-18721521379
Wechat: 18721521379
Product Name: Methacrylic acid Request for quotation
CAS: 79-41-4
Tel: 0513-66814854
Email: pules.cn@gmail.com
Mobile: +86-17551318830
CAS: 79-41-4
Tel: 0513-66814854
Email: pules.cn@gmail.com
Mobile: +86-17551318830
Spot supply
Product Name: Methacrylic acid Request for quotationCAS: 79-41-4
Tel: +86-17505207175
Email: 3787852685@qq.com
Mobile: +86-17505207175
QQ: 3787852685
Wechat: chemical6666
Spot supply
Product Name: Methacrylic acid Request for quotationCAS: 79-41-4
Tel: +86-13776910623
Email: r@reformchem.com
Mobile: +86-13776910623
QQ: 3785839865
Wechat: chemical6666
Spot supply
Product Name: Methylacrylic acid Visit Supplier Webpage Request for quotationCAS: 79-41-4
Tel: 400-968-2212
Email: 3623107365@qq.com
Mobile: 18916960931
QQ: 3623107365
Wechat: 18916960931
Spot supply
Product Name: Methacrylic acid Visit Supplier Webpage Request for quotationCAS: 79-41-4
Tel: +86-400-900-4166
Email: product@acmec-e.com
Mobile: +86-18621343501
QQ: 2881950922
Wechat: 18621343501
WhatsApp: +86-18621343501
Spot supply
Product Name: Methacrylic acid Visit Supplier Webpage Request for quotationCAS: 79-41-4
Tel: +86 0571-86722205
Email: sales@chinaskyrun.com
Mobile: +8618958170122
QQ: 2531159185
Wechat: chinaskyrun
Product Name: Methacrylic acid Request for quotation
CAS: 79-41-4
Tel: 0086-551-65418684
Email: sales@tnjchem.com
info@tnjchem.com
Mobile: 0086 189 4982 3763
QQ: 2881500840
Wechat: 189 4982 3763
WhatsApp: 0086 189 4982 3763
Product List: View Catalog
CAS: 79-41-4
Tel: 0086-551-65418684
Email: sales@tnjchem.com
info@tnjchem.com
Mobile: 0086 189 4982 3763
QQ: 2881500840
Wechat: 189 4982 3763
WhatsApp: 0086 189 4982 3763
Product List: View Catalog
Spot supply
Product Name: Methacrylic acid Visit Supplier Webpage Request for quotationCAS: 79-41-4
Tel: 15662672320
Email: 2360124261@qq.com
Mobile: 15662672320
QQ: 2360124261
Wechat: 15662672320
WhatsApp: 15662672320
Spot supply
Product Name: Methacrylic acid Request for quotationCAS: 79-41-4
Tel: 021-60556179
Email: 18721521379@163.com
Mobile: +86-18721521379
Wechat: 18721521379
Product Name: Methacrylic acid Request for quotation
CAS: 79-41-4
Tel: 0513-66814854
Email: pules.cn@gmail.com
Mobile: +86-17551318830
CAS: 79-41-4
Tel: 0513-66814854
Email: pules.cn@gmail.com
Mobile: +86-17551318830
Spot supply
Product Name: Methacrylic acid Request for quotationCAS: 79-41-4
Tel: +86-17505207175
Email: 3787852685@qq.com
Mobile: +86-17505207175
QQ: 3787852685
Wechat: chemical6666
Spot supply
Product Name: Methacrylic acid Request for quotationCAS: 79-41-4
Tel: +86-13776910623
Email: r@reformchem.com
Mobile: +86-13776910623
QQ: 3785839865
Wechat: chemical6666
Spot supply
Product Name: Methylacrylic acid Visit Supplier Webpage Request for quotationCAS: 79-41-4
Tel: 400-968-2212
Email: 3623107365@qq.com
Mobile: 18916960931
QQ: 3623107365
Wechat: 18916960931
Spot supply
Product Name: Methacrylic acid Visit Supplier Webpage Request for quotationCAS: 79-41-4
Tel: +86-400-900-4166
Email: product@acmec-e.com
Mobile: +86-18621343501
QQ: 2881950922
Wechat: 18621343501
WhatsApp: +86-18621343501
Spot supply
Product Name: Methacrylic acid Visit Supplier Webpage Request for quotationCAS: 79-41-4
Tel: +86 0571-86722205
Email: sales@chinaskyrun.com
Mobile: +8618958170122
QQ: 2531159185
Wechat: chinaskyrun
Product Name: Methacrylic acid Request for quotation
CAS: 79-41-4
Tel: 0086-551-65418684
Email: sales@tnjchem.com
info@tnjchem.com
Mobile: 0086 189 4982 3763
QQ: 2881500840
Wechat: 189 4982 3763
WhatsApp: 0086 189 4982 3763
Product List: View Catalog
CAS: 79-41-4
Tel: 0086-551-65418684
Email: sales@tnjchem.com
info@tnjchem.com
Mobile: 0086 189 4982 3763
QQ: 2881500840
Wechat: 189 4982 3763
WhatsApp: 0086 189 4982 3763
Product List: View Catalog
View History
Raw Materials for Methacrylic acid
Downstream Products for Methacrylic acid