메타크릴 산
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메타크릴 산 속성
- 녹는점
- 12-16 °C (lit.)
- 끓는 점
- 163 °C (lit.)
- 밀도
- 1.015 g/mL at 25 °C (lit.)
- 증기 밀도
- >3 (vs air)
- 증기압
- 1 mm Hg ( 20 °C)
- 굴절률
- n
20/D 1.431(lit.)
- 인화점
- 170 °F
- 저장 조건
- Store at +15°C to +25°C.
- 용해도
- 에 용해됨클로로포름, 메탄올 (약간 용해됨)
- 물리적 상태
- 액체
- 산도 계수 (pKa)
- pK1:4.66 (25°C)
- 색상
- 투명한
- 수소이온지수(pH)
- 2.0-2.2 (100g/l, H2O, 20℃)
- 냄새
- 불쾌한 냄새
- 폭발한계
- 1.6-8.7%(V)
- 수용성
- 9.7g/100mL(20℃)
- 감도
- Moisture & Light Sensitive
- Merck
- 14,5941
- BRN
- 1719937
- 노출 한도
- TLV-TWA 20 ppm (~70 mg/m3) (ACGIH).
- 안정성
- MEHQ(하이드로퀴논 메틸 에테르, 약 250ppm) 또는 하이드로퀴논을 첨가하면 안정화될 수 있습니다. 안정제가 없으면 이 물질은 쉽게 중합됩니다. 타기 쉬운. 강한 산화제, 염산과 호환되지 않습니다.
- InChIKey
- CERQOIWHTDAKMF-UHFFFAOYSA-N
- LogP
- 0.93 at 22℃
- CAS 데이터베이스
- 79-41-4(CAS DataBase Reference)
안전
- 위험 및 안전 성명
- 위험 및 사전주의 사항 (GHS)
위험품 표기 | C | ||
---|---|---|---|
위험 카페고리 넘버 | 21/22-35-37-20/21/22 | ||
안전지침서 | 26-36/37/39-45 | ||
유엔번호(UN No.) | UN 2531 8/PG 2 | ||
WGK 독일 | 1 | ||
RTECS 번호 | OZ2975000 | ||
자연 발화 온도 | 752 °F | ||
TSCA | Yes | ||
HS 번호 | 2916 13 00 | ||
위험 등급 | 8 | ||
포장분류 | II | ||
유해 물질 데이터 | 79-41-4(Hazardous Substances Data) | ||
독성 | LD50 orally in Rabbit: 1320 mg/kg | ||
기존화학 물질 | KE-24906 |
메타크릴 산 C화학적 특성, 용도, 생산
개요
구조상 α -메틸아크랄산으로서, methyl과 acrylic acid의 합성어. 녹는점 16℃, 끓는점 160.5℃, 비중 1.0128(20℃)의 자극적이고 특이한 냄새가 있는 무색의 주상결정이다.용도
메타크릴산에스테르의 중합체는 광투과성 이 크고 유기유리로서 널리 쓰인다.개요
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.화학적 성질
Methacrylic acid is is a colorless, moderately volatile, corrosive liquid with a strongly acrid odor. It was first prepared in 1865 from ethyl methacrylate, in turn obtained by dehydration of ethyl α-hydroxyisobutyrate.용도
Methacrylic acid is used in the manufacture of methacrylate resins and plastics. It is used as 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. Methacrylic acid and methacrylate esters are used to prepare a wide range of polymers [→ Polyacrylamides and Poly(Acrylic Acids), → Polymethacrylates]. Poly(methyl methacrylate) is the primary polymer in this category, and it provides water-clear, tough plastics that are used in sheet form in glazing, signs, displays, and lighting panels.제조 방법
The most common route for the preparation of methacrylic acid is from acetone as follows:In a typical process, acetone is treated with hydrogen cyanide at 140??C in the presence of ammonia as catalyst. The acetone cyanohydrin produced is treated with concentrated sulphuric acid at 100??C to form methacrylamide sulphate. This intermediate is not isolated but is directly converted to methacrylic acid by treatment with water at about 90??C.
A competitive route now in commercial operation involves the two stage oxidation of isobutene with air. The reaction proceeds via methacrolein:
생산 방법
The most common approach to methacrylic acid synthesis is the hydrolysis of methacrylamide sulfate, obtained from acetone cyanohydrin. Methyl methacrylate may be prepared directly in a similar way by adding methanol in the final reaction step.In the manufacture of methacrylic acid, methacrylamide sulfate is reacted with water under conditions similar to those used for formation of the ester. The reactor effluent separates into two phases. The upper organic layer is distilled to provide pure methacrylic acid. The lower layer is steam stripped to recover dilute aqueous methacrylic acid, which is recycled to the hydrolysis reactor. The waste acid stream is treated as in the manufacture of the ester.
정의
ChEBI: Methacrylic acid is an alpha,beta-unsaturated monocarboxylic acid that is acrylic acid in which the hydrogen at position 2 is substituted by a methyl group. It is functionally related to an acrylic acid. It is a conjugate acid of a methacrylate.일반 설명
Methacrylic acid appears as 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.공기와 물의 반응
Soluble in water.반응 프로필
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].건강위험
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.화재위험
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.잠재적 노출
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.운송 방법
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.]비 호환성
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 polymerization폐기물 처리
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.메타크릴 산 준비 용품 및 원자재
원자재
메타아크릴로니트릴
아세톤시아노히드린
methacrylammonium hydrogen sulphate
아이소부탄
이소부텐
하이드록시이소부틸산메틸에스테르
사이안화 나트륨
시안화수소
황산
준비 용품
2-[3-(2H-벤조트리아졸-2-yl)-4-하이드록시페닐]에틸 메타크릴레이트
plastic optical fiber
diagnosis latex microsphors combining anti fetoprotein
amphoteric polyacrylamide
modified filling agent SBR
CC-2SH adhesive composite used in anterior teeth
methylacrylate polycyclic norbornene and polymethyl methacrylate copolymer (ARTON)
메타크릴산 메틸, 중합체
메타크릴산 i-부틸
5,5-dibutyldihydrofuran-2(3H)-one
6731 acrylic vibration damping coating
글리시딜 메타크릴레이트
N-뷰틸 메타크릴레이트
이소낙산
메타크릴산 디에틸아미노에틸
2-하이드록시에틸 메트아크릴산
transparenting agent for paper
THERMOPLASTIC ACRYLIC RESIN
impregnanting agent for leather
thickening agent PAS
EAM resin adhesive modified with diisocyanate for orthodontias
carboxyl type cation exchange resin
DOWEX(R) 1X8
Styrene-acrylic latex
에틸렌 메타크릴레이트
optical plastics based on coplymer of diene macromolecule
2-브로모-1-프로펜
폴리아크릴산
이소부티릴 클로라이드
메타크릴산-2-하이드록시에틸에스테르
메타크릴아미드
메타크릴산 에틸
메타크릴 산 공급 업체
글로벌( 544)공급 업체
공급자 | 전화 | 이메일 | 국가 | 제품 수 | 이점 |
---|---|---|---|---|---|
Xiamen AmoyChem Co., Ltd | +86-592-6051114 +8618959220845 |
sales@amoychem.com | China | 6387 | 58 |
Hebei Mojin Biotechnology Co., Ltd | +8613288715578 |
sales@hbmojin.com | China | 12456 | 58 |
Henan Bao Enluo International TradeCo.,LTD | +86-17331933971 +86-17331933971 |
deasea125996@gmail.com | China | 2503 | 58 |
Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 |
info@tianfuchem.com | China | 21691 | 55 |
Hangzhou FandaChem Co.,Ltd. | 008657128800458; +8615858145714 |
fandachem@gmail.com | China | 9348 | 55 |
Hefei TNJ Chemical Industry Co.,Ltd. | +86-0551-65418679 +86-18949832763 |
info@tnjchem.com | China | 2989 | 55 |
Yancheng Green Chemicals Co.,Ltd | +undefined-86-25-86655873 |
info@royal-chem.com | China | 114 | 58 |
career henan chemical co | +86-0371-86658258 |
sales@coreychem.com | China | 29914 | 58 |
SHANDONG ZHI SHANG CHEMICAL CO.LTD | +86 18953170293 |
sales@sdzschem.com | China | 2931 | 58 |
Hubei Jusheng Technology Co.,Ltd. | 18871490254 |
linda@hubeijusheng.com | CHINA | 28180 | 58 |