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Pyrocatechol Violet

CAS No.
115-41-3
Chemical Name:
Pyrocatechol Violet
Synonyms
CATECHOL VIOLET;Catechol vloiet;PyrocatecholViole;PYROCATECHOL VIOLET;PyrocatecholVioletGr;Catecholsulfonphthalein;CATECHOLSULFONAPHTHALEIN;PYROCATECHOLSULFONPHTHALEIN;PYROCATECHOLSULFONEPHTHALEIN;PYROCATECHOL SULPHONPHTHALEIN
CBNumber:
CB5423604
Molecular Formula:
C19H14O7S
Molecular Weight:
386.38
MDL Number:
MFCD00005868
MOL File:
115-41-3.mol

Pyrocatechol Violet Properties

Melting point 185 °C (dec.)(lit.)
Boiling point 659.5±55.0 °C(Predicted)
Density 1.632±0.06 g/cm3(Predicted)
storage temp. -20°C Freezer, Under inert atmosphere
solubility H2O: 1 mg/mL, clear, red
pka 7.21±0.10(Predicted)
form Metallic or Crystalline Powder
color Dark red-brown
PH Range 6.0(YELLOW)-7.0(PURPLE)-9.0(PURPLISH RED)
Water Solubility Soluble in water, ethylene glycol, monomethyl ether and ethanol.
BRN 353938
Stability Stable. Incompatible with strong oxidizing agents.
CAS DataBase Reference 115-41-3(CAS DataBase Reference)
EPA Substance Registry System 1,2-Benzenediol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis- (115-41-3)

SAFETY

Risk and Safety Statements

Symbol(GHS) 
GHS07
Hazard statements  H315-H319-H335
Precautionary statements  P261-P280a-P304+P340-P305+P351+P338-P405-P501a
Risk Statements  36/37/38
Safety Statements  24/25
WGK Germany  3
TSCA  Yes
HS Code  32041900

Pyrocatechol Violet price More Price(21)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich P7884 Pyrocatechol Violet suitable for indicator 115-41-3 5g $75.5 2022-05-15 Buy
Sigma-Aldrich P7884 Pyrocatechol Violet suitable for indicator 115-41-3 10g $133 2022-05-15 Buy
TCI Chemical P0568 Pyrocatechol Violet 115-41-3 1g $23 2022-04-27 Buy
TCI Chemical P0568 Pyrocatechol Violet 115-41-3 5g $57 2022-04-27 Buy
Alfa Aesar B23513 Catechol Violet 115-41-3 5g $49.7 2021-12-16 Buy
Product number Packaging Price Buy
P7884 5g $75.5 Buy
P7884 10g $133 Buy
P0568 1g $23 Buy
P0568 5g $57 Buy
B23513 5g $49.7 Buy

Pyrocatechol Violet Chemical Properties,Uses,Production

Chemical Properties

greenish yellow powder

Uses

A complexometric indicator.

Uses

Pyrocatechol Violet is a complexometric indicator dye. This phthalein dye chelates metals to form blue to blue-violet complexs. It is also a pH indicator with a transition interval from 0 - 8 (red to violet). It is known to be unstable when alkaline. The stability is improved at a neutral pH. When the pH is between 2-7 the color may be yellow. Dyes and metabolites.

Purification Methods

It is recrystallised from glacial acetic acid. It is very hygroscopic and is an indicator standard for metal complex titrations. [Mustafin et al. Zh Anal Khim 22 1808 1967, Beilstein 19/3 V 703.]

Pyrocatechol Violet Preparation Products And Raw materials

Raw materials

Preparation Products

Global( 219)Suppliers
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View Lastest Price from Pyrocatechol Violet manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
2019-07-06 Pyrocatechol Violet
115-41-3
US $1.00 / KG 1G 99% 100KG Career Henan Chemical Co
Pyrocatechimsulfonphthalein violed PYROCATECHOL VIOLET, FOR COLORIMETRY PYROCATECHOL VIOLET INDICATOR FOR METAL TITRATION PYROCATECHOL VIOLET, INDICATOR GRADE PyrocatecholVioletGr Pyrocatechol Violet, indicator grade, pure 1,2-Benzenediol, 4,4-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis- Catecholsulfonphthalein Catechol violet, Pyrocatecholsulfonphthalein Pyrocatechol Violet (0.1% in Water) 3,3-Bis(3,4-dihydroxyphenyl)-3H-2,1-benzoxathiole 1,1-dioxide Pyrocatechol Violet,pure,indicator grade Pyrocatechol Violet≥ 98% (Assay) A,A-BIS(3,4-DIHYDROXYPHENYL)-A-HYDROXY-O-TOLUENESULFONIC ACID G-SULFONE PYROCATECHOLSULFONEPHTHALEIN PYROCATECHOLSULFONPHTHALEIN PYROCATECHOL SULPHONPHTHALEIN PYROCATECHOL VIOLET Pyrocatechol Violet, indicator grade, pure 5GR 3,3-bis(3,4-dihydroxyphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide Catechol Violet, Pyrocatecholsulphonphthalein 1,2-Benzenediol,4,4’-(3H-2,1-benzoxathiol-3-ylidene)bis-,S,S-dioxide 3’,3’,4’-Trihydroxyfuchsone-2’-SulfonicAcidPV PyrocatechinSulfonphthaleinViolet CATECHOLSULFONAPHTHALEIN CATECHOL VIOLET 3,3',4'-TRIHYDROXYFUCHSONE-2''-SULFONIC ACID Catechol Purple Indicator Solution Catechol vloiet Pyrocatechol violet pH indicator solution PyrocatecholViole Catechol Violet Indicator (4.0-7.0) 115-41-3 C19H14O7S IR/UV/ VIS Spectroscopy Reagents Analytical Reagents Analytical Chromatography Product Catalog bulk reagents