AZOLITMIN

AZOLITMIN C화학적 특성, 용도, 생산

용도

Azolitmin is an indicator instead of litmus. pH: 4.5 red, 8.3 blue. Usable with most mineral, some organic acids (not hydroxy acids) and some alkaloids; also used for preparing litmus media for bacteriologic purposes.

정의

A purplish-red colorant.

Purification Methods

It crystallises from water as dark violet scales, or as a red powder on precipitation from H2O by addtition of EtOH. It is an indicator which is red at pH 4.5 and blue at pH 8.3. [cf Kolthopff & Rosenblum Acid-Base Indicators, Macmillan, NY pp160-162, 365-366 1937.] p,p'-Azoxyanisole (4,4'-dimethoxyazoxybenzene) [1562-94 -3] M 258.3, transition temperatures: 118.1-118.8o, 135.6-136.0o, pK25 -5.23 (20% aqueous EtOH + 80% aqueous H2S O4). Crystallise the dye from absolute or 95% EtOH, or acetone, and dry it by heating under vacuum or sublime it in a vacuum onto a cold finger. [Beilstein 16 II 326.]

AZOLITMIN 준비 용품 및 원자재

원자재

준비 용품

AZOLITMIN 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Hefei TNJ Chemical Industry Co.,Ltd.	0551-65418671	sales@tnjchem.com	China	34572	58
Jilin Chinese Academy of Sciences-yanshen Technology	+undefined18143011203	info@chemextension.com	China	42057	58
Aladdin Scientific	+1-833-552-7181	sales@aladdinsci.com	United States	57511	58
RYSS TECH LTD	400-188-0725 +86 21 34310725 13611771617		China	2002	57
Hubei Wande Chemical Co., Ltd	027-59210159 15377098680	1148280011@qq.com	China	9994	58
Hubei Qifei Pharmaceutical Chemical Co., Ltd	027-027-59322506 18071128681	1438082200@qq.com	China	9995	58
Jilin Chinese Academy of Sciences - Yanshen Technology Co., Ltd	0431-80514535 19917294565	et@chemextension.com	China	5064	58
Hubei Chenghai Chemical Co., Ltd	027-59220433 18327245847	112699200@qq.com	China	9995	58
Shanghai Aladdin Biochemical Technology Co.,Ltd.	+86-18521732826	market@aladdin-e.com	China	48617	58

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