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PYROGALLOL RED

PYROGALLOL RED 구조식 이미지
카스 번호:
32638-88-3
상품명:
PYROGALLOL RED
동의어(영문):
PYROGALLOLUM;PYROGALLOL RED;PYROGALLIC ACID;PyrogallolRedGr;PYROGALLIC ACID RED;1,2,3-BENZENETRIOL RED;PYROGALLOL RED-LACTONE;Pyrogallol Red,98%,pure;Pyrogallolsulfonphalein;PYROGALLOSULFONPHTHALEIN
CBNumber:
CB1314191
분자식:
C19H12O8S
포뮬러 무게:
400.36
MOL 파일:
32638-88-3.mol

PYROGALLOL RED 속성

녹는점
133-134 °C(lit.)
끓는 점
309 °C(lit.)
밀도
1.082 g/mL at 20 °C
증기 밀도
4.4 (vs air)
증기압
10 mm Hg ( 167.7 °C)
굴절률
n20/D 1.387
저장 조건
Store at +5°C to +30°C.
물리적 상태
Liquid
색상
Dark brown
수용성
Soluble in water, ammonium hydroxide (10 mg/ml), and ethanol.
BRN
363738
CAS 데이터베이스
32638-88-3

안전

위험품 표기 Xn,Xi
위험 카페고리 넘버 20/21/22-52/53-68-36/37/38
안전지침서 36/37-61-24/25-22-36-26
유엔번호(UN No.) UN 2811 6.1/PG 3
WGK 독일 3
RTECS 번호 UX2800000
F 고인화성물질 8
TSCA Yes
HSCode  2934 99 90

PYROGALLOL RED C화학적 특성, 용도, 생산

화학적 성질

dark brown powder

용도

The white powdery crystal was made by the superheating of gallic acid. Pyrogallic acid, popularly known as pyro, is one of the earliest developers and its use has spanned three centuries. It was first used in an acid state to physically develop wet collodion negatives. When silver bromide gelatin plates were adopted pyro was used again but in an alkaline state for chemical development. It was used throughout the 20th century and often chosen for the peculiar yellow stain it imparted to gelatin negatives.

Purification Methods

It is recrystallised from aqueous alkaline solution (Na2CO3 or NaOH) by precipitation on acidification, filter it off and dry in a vacuum. [Suk Collect Czech Chem Commun 31 3127 1966, Beilstein 19 H 407, 19 II 417, 19 III/IV 599, 19/10 V 226.]

PYROGALLOL RED 준비 용품 및 원자재

원자재

준비 용품


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