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아세트산 메틸

아세트산 메틸
아세트산 메틸 구조식 이미지
카스 번호:
79-20-9
한글명:
아세트산 메틸
동의어(한글):
아세트산메틸;데보톤;Methylethanoate,아세트산메틸;메틸에탄오에이트;아세트산,메틸에스테르;초산메틸;테레톤;초산메틸;메틸아세테이트
상품명:
Methyl acetate
동의어(영문):
Metile;Tereton;Devoton;FEMA 2676;CH3COOCH3;octanmetylu;Methylacetat;Methylacetaat;METHYL ACETATE;Acetic acid-Me
CBNumber:
CB9167443
분자식:
C3H6O2
포뮬러 무게:
74.08
MOL 파일:
79-20-9.mol

아세트산 메틸 속성

녹는점
-98 °C
끓는 점
57-58 °C(lit.)
밀도
0.932 g/mL at 25 °C(lit.)
증기 밀도
2.55 (vs air)
증기압
165 mm Hg ( 20 °C)
굴절률
n20/D 1.361(lit.)
FEMA
2676 | METHYL ACETATE
인화점
3.2 °F
저장 조건
Flammables area
용해도
250g/l
물리적 상태
Solution
색상
Clear colorless to slightly pale yellow
상대극성
0.253
냄새
Slightly acrid, sweet; fragrant.
폭발한계
3.1-16%(V)
수용성
250 g/L (20 ºC)
최대 파장(λmax)
λ: 255 nm Amax: 1.0
λ: 275 nm Amax: 0.1
λ: 300 nm Amax: 0.01
Merck
14,6008
JECFA Number
125
BRN
1736662
Henry's Law Constant
0.90 at 20.00 °C, 1.56 at 30.00 °C (headspace-GC, Hovorka et al., 2002)
노출 한도
TLV-TWA 200 ppm (~610 mg/m3) (ACGIH, MSHA, and OSHA); TLV-STEL 250 ppm (~760 mg/m3) (ACGIH); IDLH 10,000 ppm (NIOSH).
안정성
Stable. Extremely flammable - readily forms explosive mixtures with air. Note low flash point and wide explosion limits. Incompatible with strong oxidizing agents, strong bases, strong acids, nitrates. May be moisture sensitive.
CAS 데이터베이스
79-20-9(CAS DataBase Reference)
NIST
Acetic acid, methyl ester(79-20-9)
EPA
Acetic acid, methyl ester(79-20-9)
안전
  • 위험 및 안전 성명
  • 위험 및 사전주의 사항 (GHS)
위험품 표기 F,Xi
위험 카페고리 넘버 11-36-66-67
안전지침서 16-26-29-33
유엔번호(UN No.) UN 1231 3/PG 2
WGK 독일 1
RTECS 번호 AI9100000
자연 발화 온도 936 °F
TSCA Yes
HS 번호 2915 39 00
위험 등급 3
포장분류 II
유해 물질 데이터 79-20-9(Hazardous Substances Data)
독성 LD50 orally in Rabbit: > 5000 mg/kg LD50 dermal Rat > 2000 mg/kg
그림문자(GHS):
신호 어: Danger
유해·위험 문구:
암호 유해·위험 문구 위험 등급 범주 신호 어 그림 문자 P- 코드
H225 고인화성 액체 및 증기 인화성 액체 구분 2 위험 P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H319 눈에 심한 자극을 일으킴 심한 눈 손상 또는 자극성 물질 구분 2A 경고 P264, P280, P305+P351+P338,P337+P313P
H336 졸음 또는 현기증을 일으킬 수 있음 특정표적장기 독성 물질(1회 노출);마취작용 구분 3 경고 P261, P271, P304+P340, P312,P403+P233, P405, P501
예방조치문구:
P210 열·스파크·화염·고열로부터 멀리하시오 - 금연 하시오.
P261 분진·흄·가스·미스트·증기·...·스프레이의 흡입을 피하시오.
P280 보호장갑/보호의/보안경/안면보호구를 착용하시오.
P303+P361+P353 피부(또는 머리카락)에 묻으면 오염된 모든 의복은 벗거나 제거하시오 피부를 물로 씻으시오/샤워하시오.
P305+P351+P338 눈에 묻으면 몇 분간 물로 조심해서 씻으시오. 가능하면 콘택트렌즈를 제거하시오. 계속 씻으시오.
P337+P313 눈에 대한 자극이 지속되면 의학적인 조치· 조언를 구하시오.
P370+P378 화재 시 불을 끄기 위해 (Section 5. 폭발, 화재시 대처방법의 적절한 소화제)을(를) 사용하시오.
P405 밀봉하여 저장하시오.
P403+P235 환기가 잘 되는 곳에 보관하고 저온으로 유지하시오.

아세트산 메틸 C화학적 특성, 용도, 생산

용도

메틸 아세테이트의 주요 용도는 래커 (lacquer)와 같은 속건성 도료의 용제입니다. 그것은 또한 셀룰로오스 접착제, 향수의 제조 및 염료 제조에서의 관계형 용매로서 용매로 사용됩니다. 이 제품의 주요 사용자 최종 시장은 페인트, 코팅, 화장품, 섬유 및 모터 산업입니다.

포장, 보관 및 운송

저장은 일반적으로 산화제가 함유되지 않은 시원하고 건조하며 통풍이 잘되는 시설에 보관됩니다. 메틸 아세테이트는 직사 광선, 열 및 화염에 노출되지 않도록하십시오.

개요

Methyl acetate, also known as Me O Ac , acetic acid methyl ester or methyl ethanoate, is a carboxylate ester with the formula CH3COOCH3. It is a flammable liquid with a characteristically pleasant smell reminiscent of some glues and nail polish removers. Methyl acetate is occasionally used as a solvent, being weakly polar and lipophilic, but its close relative ethyl acetate is a more common solvent being less toxic and less soluble in water. Methyl acetate has a solubility of 25% in water at room temperature. At elevated temperature its solubility in water is much higher. Methyl acetate is not stable in the presence of strong aqueous bases or aqueous acids. Methyl acetate is VOC exempt.

화학적 성질

Methyl acetate has a pleasant, fruity odor and slightly bitter flavor. May be prepared by boiling acetic acid and methanol in the presence of acid catalysts; or by heating methanol with an excess carbon monoxide under pressure in the presence of a catalyst (phosphoric acid, cobalt salts).

화학적 성질

Methyl acetate has a pleasant, fruity odor and slightly bitter flavor.

화학적 성질

Methyl acetate is a colorless liquid with a fruity odor.

화학적 성질

colourless liquid with a pleasant odour

출처

Reported found in apple, banana, sweet and sour cherry, tangerine juice, black currants, guava, grapes, melon, peach, pear, pineapple, strawberry, cabbage, tomato, clove bud, peppermint oil, vinegar, bread, cheeses, butter, yogurt, beef, beer, cognac, rum, whiskies, cider, sherry, grape wines, cocoa, coffee, filbert, peanut, honey, soybean, olive, passion fruit, fruit brandies, fig, gin, kiwifruit, clary sage, arrack and nectarine.

용도

Methyl acetate is used as a solvent forlacquers, resins, oils, and nitrocellulose; inpaint removers; as a flavoring agent; and inthe manufacture of artificial leather.

용도

Solvent for nitrocellulose, acetylcellulose, and many resins and oils; manufacture of artificial leather.

제조 방법

Methyl acetate is produced industrially via the carbonylation of methanol as a byproduct of the production of acetic acid.Methyl acetate also arises by esterification of acetic acid with methanol in the presence of strong acids such as sulfuric acid, this production process is famous because of Eastman Kodak's intensified process using a reactive distillation.
2–1-Reactions
In the presence of strong bases such as sodium hydroxide or strong acids such as hydrochloric acid or sulfuric acid it is hydrolyzed back into methanol and acetic acid, especially at elevated temperature. The conversion of methyl acetate back into its components, by an acid , is a first-order reaction with respect to the ester. The reaction of methyl acetate and a base, for example sodium hydroxide, is a second-order reaction with respect to both reactants.
3-Applications
A major use of methyl acetate is as a volatile low toxicity solvent in glues, paints, and nail polish removers. Acetic anhydride is produced by carbonylation of methyl acetate in a process that was inspired by the Monsanto acetic acid synthesis.

Aroma threshold values

Detection: 1.5 to 47 ppm

Taste threshold values

Taste characteristics at 60 ppm: green, ethereal, fruity, fresh, rum and whiskey-like.

일반 설명

A clear colorless liquid with a fragrant odor. Moderately toxic. Flash point 14°F. Vapors heavier than air.

공기와 물의 반응

Highly flammable. Water soluble.

반응 프로필

Methyl acetate presents a fire or explosion hazard when exposed to strong oxidizing agents. Emits irritating fumes and acrid smoke when heated to decomposition, [Lewis, 3rd ed., 1993, p. 826]. Methyl acetate reactivity is consistent with other compounds of the ester group.

위험도

Flammable, dangerous fire and explosion risk, explosive limits in air 3–16%. Irritant to respiratory tract. Headache, dizziness, nausea, eye damage (degeneration of ganglion cells in the retina).

건강위험

(Very similar to those of methyl alcohol, which constitutes 20% of commercial grade.) Inhalation causes headache, fatigue, and drowsiness; high concentrations can produce central nervous system depression and optic nerve damage. Liquid irritates eyes and may cause defatting and cracking of skin. Ingestion causes headache, dizziness, drowsiness, fatigue; may cause severe eye damage.

건강위험

The toxic effects from exposure to methylacetate include inflammation of the eyesvisual and nervous disturbances, tightnessof the chest, drowsiness, and narcosis. Ithydrolyzes in body to methanol, which prob ably produces the atrophy of the optic nerve.A 4-hour exposure to 32,000 ppm was lethalto rats. Oral and dermal toxicities of thiscompound are low. An oral LD50 value inrats is on the order of 5000 mg/kg.

화재위험

Flash Point (°F): 22 ℃; 14 ℃; Flammable Limits in Air (%): 3.1-16; Fire Extinguishing Agents: Dry chemical, alcohol foam, carbon dioxide; Fire Extinguishing Agents Not To Be Used: Water may be ineffective;Special Hazards of Combustion Products: Not pertinent; Behavior in Fire: Vapor is heavier than fire and may travel a considerable distance to a source of ignition and flash back; Ignition Temperature (°F): 935; Electrical Hazard: Data not available; Burning Rate: 3.7 mm/min.

화재위험

Behavior in Fire: Vapor is heavier than air and may travel a considerable distance to a source of ignition and flash back.

화학 반응

Reactivity with Water Reacts slowly to form acetic acid and methyl alcohol; the reaction is not violent; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

Safety Profile

Moderately toxic by several routes. A human systemic irritant by inhalation. A moderate skin and eye irritant. Mutation data reported. Dangerous fire hazard when exposed to heat, flame, or oxidizers. Moderate explosion hazard when exposed to heat or flame. When heated to decomposition it emits acrid smoke and fumes. See also ESTERS.

Chemical Synthesis

By boiling acetic acid and methanol in the presence of acid catalysts, or by heating methanol with an excess of carbon monoxide under pressure in the presence of a catalyst (phosphoric acid, cobalt salts).

잠재적 노출

Methyl acetate is used as a solvent in lacquers and paint removers; and as an intermediate in pharmaceutical manufacture.

응급 처치

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. Medical observation is recommended for 24 to 48 hours after breathing overexposure, as pulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consider administering a drug or other inhalation therapy.

운송 방법

UN1231 Methyl acetate, Hazard Class: 3; Labels: 3-Flammable liquid.

Purification Methods

Methanol in methyl acetate can be detected by measuring its solubility in water. At 20o, the solubility of methyl acetate in water is ca 35g per 100mL, but 1% MeOH confers complete miscibility. Methanol can be removed by conversion to methyl acetate, by refluxing for 6hours with acetic anhydride (85mL/L), followed by fractional distillation. Acidic impurities can be removed by shaking with anhydrous K2CO3 and distilling. An alternative treatment is with acetyl chloride, followed by washing with concentrated NaCl and drying with CaO or MgSO4. (Solid CaCl2 cannot be used because it forms a crystalline addition compound.) Distillation from copper stearate destroys peroxides. Free alcohol or acid can be eliminated from methyl acetate by shaking with strong aqueous Na2CO3 or K2CO3 (three times), then with aqueous 50% CaCl2 (three times), saturated aqueous NaCl (twice), drying with K2CO3 and distilling it from P2O5. [Beilstein 2 IV 122.]

비 호환성

Vapor may form explosive mixture with air. A Strong reducing agent. Incompatible water, acids, nitrates, strong oxidizers; alkalis. Attacks some plastics. Attacks many metals in presence of water. Reacts slowly with water, forming acetic acid and methanol. Decomposes in heat; on contact with air, bases, strong oxidizers; UV-light; possible fire and explosion hazard

폐기물 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.

아세트산 메틸 준비 용품 및 원자재

원자재

준비 용품


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