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1,4-Dihydroxyanthraquinone

Basic information Safety Supplier Related

1,4-Dihydroxyanthraquinone Basic information

Product Name:
1,4-Dihydroxyanthraquinone
Synonyms:
  • DSD ACID
  • CI NO 58050
  • CI 58050
  • LABOTEST-BB LT00052844
  • 1,4-dihydroxy-10-anthracenedione
  • 1,4-dihydroxy-9,10(9H,10H)anthracenedione
  • 1,4-Dihydroxy-9,10-anthraquinone
  • 1,4-Dihydroxyanthra-9,10-quinone
CAS:
81-64-1
MF:
C14H8O4
MW:
240.21
EINECS:
201-368-7
Product Categories:
  • Intermediates of Dyes and Pigments
  • Solvent Dyestuff
  • Anthraquinones, Hydroquinones and Quinones
  • Anthraquinones
  • Hydroxyanthraquinones
Mol File:
81-64-1.mol
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1,4-Dihydroxyanthraquinone Chemical Properties

Melting point:
198-199 °C(lit.)
Boiling point:
450 °C
Density 
1.3032 (rough estimate)
vapor density 
8.3 (vs air)
vapor pressure 
1 mm Hg ( 196.7 °C)
refractive index 
1.5430 (estimate)
Flash point:
222 °C
storage temp. 
Store below +30°C.
solubility 
<1g/l
form 
powder
pka
pK (18°) 9.51
Colour Index 
58050
color 
red-brown
Water Solubility 
<1 g/L (20 ºC)
Merck 
14,8064
BRN 
1914036
InChIKey
GUEIZVNYDFNHJU-UHFFFAOYSA-N
CAS DataBase Reference
81-64-1(CAS DataBase Reference)
NIST Chemistry Reference
9,10-Anthracenedione, 1,4-dihydroxy-(81-64-1)
EPA Substance Registry System
Quinizarin (81-64-1)
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Safety Information

Hazard Codes 
Xi,N
Risk Statements 
36/37/38-43-50/53
Safety Statements 
22-24/25-36/37-26-61-60
RIDADR 
UN 3077 9 / PGIII
WGK Germany 
2
RTECS 
CB6600000
TSCA 
Yes
HS Code 
2914 69 80
PackingGroup 
III
Hazardous Substances Data
81-64-1(Hazardous Substances Data)
Toxicity
LD50 orally in Rabbit: > 5000 mg/kg

MSDS

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1,4-Dihydroxyanthraquinone Usage And Synthesis

Chemical Properties

orange to red-brown crystalline powder

Uses

Antioxidant in synthetic lubricants, dyes.

Uses

1,4-Dihydroxyanthraquinone, also known as quinizarin, is of great importance in manufacturing disperse, acid, and vat dyes.

Definition

ChEBI: A dihydroxyanthraquinone having the two hydroxy substituents at the 1- and 4-positions; formally derived from anthraquinone by replacement of two hydrogen atoms by hydroxy groups

Synthesis Reference(s)

Synthesis, p. 633, 1974 DOI: 10.1055/s-1974-23387
Tetrahedron Letters, 28, p. 1533, 1987 DOI: 10.1016/S0040-4039(01)81035-2

Safety Profile

Poison by intravenous route. Moderately toxic by intraperitoneal route. Mutation data reported. An eye irritant. A weak allergen. When heated todecomposition it emits acrid smoke and irritating fumes.

Purification Methods

Crystallise quinizarin from glacial acetic acid. [Beilstein 8 H 450, 8 IV 3260.]

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