Dithizone

  • Diphenylthiocarbazone
  • Diazenecarbohydrazonothioic acid
  • (Phenylazo)thioformic acid 2-phenylhydrazide
  • Diazenecarbothioic acid, phenyl-, 2-phenylhydrazide
Formula
C6H5NNCSNHNHC6H5
Structure
Description
Black powder.
Uses
Sensitive reagent for several heavy metals, Co, Cu, Pb, and Hg.

Registry Numbers and Inventories.
CAS
60-10-6
EC (EINECS/ELINCS)
200-454-1
R 36/37/38
RTECS
LQ9450000
RTECS class
Other
Merck
13,3413
Beilstein/Gmelin
748838
Beilstein Reference
4-16-00-00018
Swiss Giftliste 1
G-9325
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C13H12N4S
Formula mass
256.33
Melting point, °C
168
Boiling point, °C
406
Solubility in water
Insoluble
pKa/pKb
5.31 (pKa)

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. Minimize dust generation and accumulation. 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, then place into a suitable container for disposal. Avoid generating dusty conditions.
Disposal code
3
Stability
Materials containing similar functional groups can decompose at elevated temperatures. Solutions are not stable, but it may be preserved by a layer of aqueous SO2.
Incompatibilities
Strong oxidizing agents.
Decomposition
Nitrogen oxides, carbon monoxide, oxides of sulfur, carbon dioxide.

Fire.
Flash Point,°C
168
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. This material in sufficient quantity and reduced particle size is capable of creating a dust explosion. Extinguishing media: Use water spray to cool fire-exposed containers. In case of fire, use water fog, dry chemical, carbon dioxide, or regular foam.

Health.
Poison_Class
3
Exposure effects
Compound chelates metal. When administered to animals, this material induces diabetes.
   Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
May cause respiratory tract irritation.
   Skin
May cause skin irritation. Low hazard for usual industrial handling.
   Eyes
Dust may cause mechanical 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 if cough or other symptoms appear.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. If irritation develops, get medical aid.

Transport.
HS Code
2930 90 70