1,4-Dihydroxy-9,10-anthracenedione

  • chinizarin
  • 1,4-dihydroxy-9,10-anthraquinone
  • Quinizarine
  • Smoke orange r
Formula
C14H8O4
Structure
Description
Orange crystals from acetic acid; orange plates from ether; deep red
Uses
Antioxidant in synthetic lubricants.

Registry Numbers and Inventories.
CAS
81-64-1
EC (EINECS/ELINCS)
201-368-7
S 22 24/25
RTECS
CB6600000
RTECS class
Mutagen; Primary Irritant
UN (DOT)
1325
Merck
12,8250
Beilstein/Gmelin
1914036
Beilstein Reference
4-08-00-03260
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C14H8O4
Formula mass
240.22
Melting point, °C
202
Boiling point, °C
465
Decomposition point, °C
410
Vapor pressure, mmHg
3E-9 (25 C)
Vapor density (air=1)
8.3
Density
1.278 g/cm3 (20 C)
Solubility in water
soluble in hot water
pKa/pKb
7.54 (pKa)
Partition coefficient, pKow
3.70
Heat of vaporization
75.5 kJ/mol
Heat of combustion
-6057 kJ/mol

Hazards and Protection.
Storage
Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong acids.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
222
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire, use water fog, dry chemical, carbon dioxide, or regular foam.
Fire potential
Flammable/combustible material. May be ignited by friction, heat, sparks or flames.
Combustion products
Fire may produce irritating and/or toxic gases.

Health.
Exposure effects
   Ingestion
May cause irritation of the digestive tract.
   Inhalation
May cause respiratory tract irritation.
   Skin
May cause skin irritation.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1325
Response guide
Hazard class
4.1
Packing Group
II; III