ChemicalBook > CAS DataBase List > Pyrocatechol Violet

Pyrocatechol Violet

Product Name
Pyrocatechol Violet
CAS No.
115-41-3
Chemical Name
Pyrocatechol Violet
Synonyms
Catechol vloiet;CATECHOL VIOLET;PyrocatecholViole;Catechol Violet AR;PYROCATECHOL VIOLET;PyrocatecholVioletGr;suitable for indicator;Catecholsulfonphthalein;CATECHOLSULFONAPHTHALEIN;Pyrocatechol violet (6CI)
CBNumber
CB5423604
Molecular Formula
C19H14O7S
Formula Weight
386.38
MOL File
115-41-3.mol
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Pyrocatechol Violet Property

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
form 
Metallic or Crystalline Powder
pka
7.21±0.10(Predicted)
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)
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Safety

Risk Statements 
36/37/38
Safety Statements 
24/25
WGK Germany 
3
TSCA 
Yes
HS Code 
32041900
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
P7884
Product name
Pyrocatechol Violet
Purity
suitable for indicator
Packaging
5g
Price
$86.3
Updated
2024/03/01
Sigma-Aldrich
Product number
P7884
Product name
Pyrocatechol Violet
Purity
suitable for indicator
Packaging
10g
Price
$152
Updated
2024/03/01
TCI Chemical
Product number
P0568
Product name
Pyrocatechol Violet
Packaging
1g
Price
$24
Updated
2024/03/01
TCI Chemical
Product number
P0568
Product name
Pyrocatechol Violet
Packaging
5g
Price
$59
Updated
2024/03/01
Alfa Aesar
Product number
B23513
Product name
Catechol Violet
Packaging
5g
Price
$60
Updated
2024/03/01
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Pyrocatechol Violet Chemical Properties,Usage,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

Saccharin Catechol

Preparation Products

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View Lastest Price from Pyrocatechol Violet manufacturers

Career Henan Chemical Co
Product
Pyrocatechol Violet 115-41-3
Price
US $1.00/KG
Min. Order
1G
Purity
99%
Supply Ability
100KG
Release date
2018-08-13

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