Pyrogallol

For Research Use Only.
Category
Phenols
Cat.No.
NP4599
CAS
87-66-1
Product Name
Pyrogallol
Structure

Product Details

Description
Pyrogallol is a colorant and opacifier, and has antiseptic and antipsoriatic properties.
Synonyms
1,2,3-Benzenetriol; 1,2,3-Trihydroxybenzene; 2,3-Dihydroxyphenol; Pyrogallol Acid 2,6-Dihydroxyphenol; Antioxidant PY; Fouramine Brown AP; Fourrine 85; Fourrine PG; NSC 5035; Pyrogallic Acid
IUPAC Name
benzene-1,2,3-triol
Molecular Weight
126.11
Molecular Formula
C6H6O3
Canonical SMILES
C1=CC(=C(C(=C1)O)O)O
InChI
InChI=1S/C6H6O3/c7-4-2-1-3-5(8)6(4)9/h1-3,7-9H
InChIKey
WQGWDDDVZFFDIG-UHFFFAOYSA-N
Boiling Point
309.0±0.0°C at 760 mmHg
Melting Point
131-134°C
Flash Point
>230 °F
Purity
≥98%
Density
1.5±0.1 g/cm3
Solubility
Soluble in Methanol (Slightly), Water (Sparingly)
Appearance
White to Pale Brown Solid
Storage
Store at 2-8°C under inert atmosphere
BRN
907431
Chemical Properties
White or nearly white needle- or
leaf-shaped crystals or crystalline powder.Pyrogallol is practically odorless.
Color
White
Definition
ChEBI: A benzenetriol carrying hydroxy groups at positions 1, 2 and 3.
EINECS
201-762-9
F
8
Form
Very Fine Crystalline Powder
Hazard Class
Xn
Hazard Codes
6.1
HS Code
2907 29 00
Packing Groups
III
pH
4-5 (50g/L, H2O, 20 °C)
pKa
pK1:9.03(0);pK2:11.63(+1) (25°C)
Refractive Index
n20/D 1.387
RIDADR
UN 2811 6.1/PG 3
Risk Statements
20/21/22-52/53-68-40-36/38
RTECS
UX2800000
Safety Statements
22-24/25-61-36/37-26
Stability
Stability Stable, but decolourises in light. Combustible. Incompatible with strong oxidising agents, alkalies, metal oxides, ammonia, antipyrine, phenol, iodine, lime water, menthol, potassium permanganate, strong bases.
Toxicity
LD50 orally in rabbits: 1.6 g/kg (Dollahite)
Uses
Pyrogallol possesses importance as a spectrophotometric reagent in the determination of niobium and tantalum. The absorptions of niobium and tantalum complexes are usually measured at 340 and 335 nm, respectively. The niobium complex is formed in slightly acidic medium, and the tantalum complex in strongly acidic medium (4 N HC1). The absorption spectra are pH-dependen.
Vapor Density
4.4 (vs air)
Vapor Pressure
10 mm Hg ( 167.7 °C)
Water Solubility
400 g/L (25 °C)
WGK Germany
3
  • Verification code
Online Inquiry
  • Verification code
×
Top
Inquiry Basket