Purpurin

  • C.I. 58205
  • Verantin
  • Smoke Brown G
  • Hydroxylizaric acid
  • 1,2,4-Trihydroxyanthraquinone
  • 1,2,4-Trihydroxy-9,10-anthracenedione
Formula
C14H8O5
Structure
Description
Dark red needles.
Uses
Forms colored lakesâ with various metal salts and is a fast dye for cotton printing.

Registry Numbers and Inventories.
CAS
81-54-9
EC (EINECS/ELINCS)
201-359-8
RTECS
CB8200000
RTECS class
Tumorigen; Mutagen; Natural Product; Primary Irritant
Merck
12,8132
Beilstein/Gmelin
1887127
Beilstein Reference
4-08-00-03568
Swiss Giftliste 1
G-6249
Japan ENCS (MITI)
Listed

Properties.
Formula
C14H8O5
Formula mass
256.21
Melting point, °C
253-256
Boiling point, °C
488
Vapor pressure, mmHg
4E-10 (25 C)
Solubility in water
Insoluble
pKa/pKb
7.05 (pKa)
Partition coefficient, pKow
3.92
Heat of vaporization
78.3 kJ/mol
Heat of combustion
-5873 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Use with adequate ventilation.
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
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Strong oxidizing agents.
Decomposition
Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
263
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
Effects may be delayed.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
Causes respiratory tract irritation. Can produce delayed pulmonary edema.
   Skin
Causes skin irritation.
   Eyes
Causes eye irritation. May cause chemical conjunctivitis.

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

Transport.