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순도시험
(1) 비중 : 이 품목의 비중은 1.001～1.004이어야 한다.
(2) 굴절률 : 이 품목의 굴절률 
은 1.532～1.535이어야 한다.
(3) 용상 : 이 품목 1mL를 50% 에탄올 10mL에 녹일 때, 그 액은 징명하여야 한다.
(4) 염소화합물 : 이 품목은 향료시험법 중 할로겐시험법 동망법에 따라 시험할 때, 이에 적합하여야 한다.
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확인시험
이 품목을 적외부흡수스펙트럼측정법 (4) 샌드윗치법에 따라 측정할 때, 1,680cm-1, 1,605cm-1, 1,358cm-1, 1,268cm-1 및 815cm-1의 각각의 부근에 흡수대를 확인한다.
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정량법
정 량 법 이 품목 약 1g을 정밀히 달아 향료시험법 중 알데히드류 및 케톤류함량측정법의 히드록실아민법 제2법에 따라 시험한다. 단, 가열시간은 1시간으로 한다.
0.5N 염산 1mL ＝ 67.07mg C9H10O
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개요
4'-Methylacetophenone has a fruity, floral odor resembling acetophenone and a sweet, strawberry-like flavor. May be prepared
by slow addition of acetyl chloride to a mixture of toluene and
AlCl in an ice bath and under vacuum, maintaining the temperature
at +5°C and then letting it increase to +20°C.
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화학적 성질
4'-Methylacetophenone has
been identified in Brazilian rosewood oil and in pepper. It occurs as colorless crystals with a floral, sweet odor that is milder than that of acetophenone.
4-Methylacetophenone is prepared from toluene and acetic anhydride or acetyl
chloride by a Friedel–Crafts reaction. It is used for blossom notes in mimosaand
hawthorn-type perfumes, especially soap perfumes.
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출처
Reported found in the essential oil distilled from the wood of Myrocarpus fastigiatus, Myrocarpus frondo sus, Bois de Rose. Also reported found in sour cherry, orange and grapefruit peel oil, black currants, guava, peach, blackberry,
celery, potato, tomato, mentha oils, pepper, parsley, smoked fish, cognac, parmesan cheese, cocoa, tea, soybean, cloudberry,
mango, cauliflower, broccoli, rice bran, buckwheat, dried bonito, cherimoya, calabash nutmeg and mastic gum leaf oil, cooked
cabbage, mandarin juice.
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용도
4'-Methylacetophenone is a methylated acteophenone used in cosmetics and perfumery. The presence of 4'-Methylacetophenone has been shown to accelerate the photopolymerization of Methyl methacrylate.
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정의
ChEBI: 4'-Methylacetophenone is an aromatic ketone. It is a metabolite found in or produced by Saccharomyces cerevisiae.
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제조 방법
By slow addition of acetyl chloride to a mixture of toluene and AlCl in an ice bath and under vacuum, maintaining the
temperature at +5°C and then letting it increase to +20°C.
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일반 설명
4′-Methylacetophenone is a clear colourless to pale yellowish liquid that occurs naturally in mango, tomato and orange.
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Safety Profile
Moderately toxic by
ingestion. A human skin irritant. A
flammable liquid. When heated to
decomposition it emits acrid smoke and
irritating fumes. See also KETONES.
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Purification Methods
Impurities, including the o-and m-isomers, are removed by forming the semicarbazone (m 212-213.5o) which, after repeated crystallisation, is hydrolysed to the ketone. [Brown & Marino J Am Chem Soc 84 1236 1962.] It can also be purified by distillation under reduced pressure, followed by low temperature crystallisation from isopentane. [Beilstein 7 IV 701.]
