시트랄

시트랄 속성

시트랄 C화학적 특성, 용도, 생산

순도시험

  (1) 비중 : 이 품목의 비중은 0.885～0.891이어야 한다.

  (2) 굴절률 : 이 품목의 굴절률 은 1.486～1.490이어야 한다.

  (3) 용상 : 이 품목 1mL를 60% 에탄올 10mL에 녹일 때, 그 액은 징명하여야 한다.

  (4) 산가 : 이 품목의 산가는 향료시험법 중 산가측정법에 따라 시험할 때, 5 이하이어야 한다.

확인시험

  이 품목 1mL에 아황산수소나트륨시액 2mL 및 탄산나트륨시액 2방울을 가하여 흔들어 섞으면 발열하여 백색의 결정덩어리로 된다. 이에 아황산수소나트륨시액 10mL를 추가하여 수욕중에서 흔들어 섞으면서 가열하면 이 결정덩어리는 녹으며 레몬과 같은 향기는 없어진다.

정량법

  이 품목 약 1g을 정밀히 달아 향료시험법 중 알데히드류 및 케톤류함량측정법의 히드록실아민법 제2법에 따라 정량한다. 다만 방치시간은 15분간으로 한다.

0.5N 염산 1mL ＝ 76.12mg C₁₀H₁₆O

화학적 성질

Citral occurs as (2Z)- and (2E)-isomers (citral a and b, respectively) analogous to the corresponding alcohols, geraniol and nerol: geranial (citral a), bp2.7 kPa 118–119 °C, d20 0.8888, n20 D 1.4898; neral (citral b), bp2.7 kPa 120 °C, d20 0.8869, n20 D 1.4869. Natural citral is nearly always a mixture of the two isomers. It occurs in lemongrass oil (up to 85%), in Litsea cubeba oil (up to 75%), and in small amounts inmany other essential oils. The citrals are colorless to slightly yellowish liquids, with an odor reminiscent of lemon.
Since citral is an α,β-unsaturated aldehyde with an additional double bond, it is highly reactive and may undergo reactions such as cyclization and polymerization. Geraniol, citronellol, and 3,7-dimethyloctan-l-ol can be obtained from citral by stepwise hydrogenation. Citral can be converted into a number of addition compounds; the (Z)- and (E)-isomers can be separated via the hydrogen sulfite addition compounds.The condensation of citral with active methylene groups is used on an industrial scale in the synthesis of pseudoionones, which are starting materials for ionones and vitamins.

출처

Reported found in apricot, clary sage, ginger, grape, grapefruit, lemon, lime, mandarin, orange, raspberry, tamarind, tangerine, tea and tomato.

용도

Citral is an anti-microbial agent found in plants with antibacterial activity against some food pathogens. It is also a fragrance compound with a distinct lemon scent.

정의

Commercial material is a mixture of α and β isomers.

일반 설명

A clear yellow colored liquid with a lemon-like odor. Less dense than water and insoluble in water. Toxic by ingestion. Used to make other chemicals.

공기와 물의 반응

Insoluble in water.

반응 프로필

Citral is an aldehyde. Aldehydes are frequently involved in self-condensation or polymerization reactions. These reactions are exothermic; they are often catalyzed by acid. Aldehydes are readily oxidized to give carboxylic acids. Flammable and/or toxic gases are generated by the combination of aldehydes with azo, diazo compounds, dithiocarbamates, nitrides, and strong reducing agents. Aldehydes can react with air to give first peroxo acids, and ultimately carboxylic acids. These autoxidation reactions are activated by light, catalyzed by salts of transition metals, and are autocatalytic (catalyzed by the products of the reaction). The addition of stabilizers (antioxidants) to shipments of aldehydes retards autoxidation. Citral can react with alkalis and strong acids. Citral can readily isomerize.

위험도

Questionable carcinogen.

화재위험

Citral is combustible.

색상 색인 번호

Citral is an aldehyde fragrance and flavoring ingredient, a blend of isomers cis (Neral) and trans (geranial). As a fragrance allergen, citral has to be mentioned by name in cosmetics within the EU.

Safety Profile

Moderately toxic by intraperitoneal route. Mildly toxic by ingestion. Experimental reproductive effects. A severe human and experimental skin irritant. Mutation data reported. Combustible liquid. When heated to decomposition it emits acrid smoke and irritating fumes.

시트랄 준비 용품 및 원자재

원자재

준비 용품

시트랄 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Hebei Kingfiner Technology Development Co.Ltd	+86-15532196582 +86-15373005021	lisa@kingfinertech.com	China	3001	58
Shandong Juchuang Chemical Co., LTD	+undefined15030412209	admin@juchuangchem.com	China	387	58
Ouhuang Engineering Materials (Hubei) Co., Ltd	+8617702722807	admin@hbouhuang.com	China	3001	58
Hebei Zhuanglai Chemical Trading Co.,Ltd	+8613343047651	admin@zlchemi.com	China	1942	58
Capot Chemical Co.,Ltd.	571-85586718 +8613336195806	sales@capotchem.com	China	29797	60
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21689	55
Hefei TNJ Chemical Industry Co.,Ltd.	+86-0551-65418679 +86-18949832763	info@tnjchem.com	China	2989	55
Shanghai Zheyan Biotech Co., Ltd.	18017610038	zheyansh@163.com	CHINA	3620	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

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