Dimercaprol

  • Antoxol
  • BAL
  • British anti-Lewisite
  • Dicaptol
  • Dimercaprol propanol
  • Dimercaptol
Formula
HOCH2CH(SH)CH2SH
Structure
Description
Clear colorless viscous liquid with a pungent offensive odor of mercaptans.
Uses
Anti-gas warfare agent.

Registry Numbers and Inventories.
CAS
59-52-9
EC (EINECS/ELINCS)
200-433-7
EC Class
irritant
R 22 36/38
S 26 36/37/39
RTECS
UB2625000
RTECS class
Drug; Mutagen; Reproductive Effector; Human Data; Natural Product
UN (DOT)
2810
Merck
13,3234
Beilstein/Gmelin
1732058
Beilstein Reference
4-01-00-02770
Swiss Giftliste 1
G-6811
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C3H8OS2
Formula mass
124.22
Melting point, °C
77
Boiling point, °C
223
Vapor pressure, mmHg
0.02 (25 C)
Vapor density (air=1)
4.28
Density
1.2531 g/cm3 (20 C)
Solubility in water
87 g/L
Viscosity
13.50 cp (25 C)
Surface tension
46.9 g/s2 (25 C)
Refractive index
1.5698 (20 C)
pKa/pKb
8.88 (pKa)
Partition coefficient, pKow
0.84
Heat of vaporization
53.5 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Refrigerator (approx 4 C). Store protected from light.
Handling
Use only in a well ventilated area. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Store protected from light. Wash clothing before reuse.
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
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Provide ventilation.
Disposal code
6
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Oxidizing agents, reducing agents, bases, alkali metals.
Decomposition
Carbon monoxide, oxides of sulfur, irritating and toxic fumes and gases, carbon dioxide, hydrogen sulfide.

Fire.
Flash Point,°C
89
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. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
This chemical is probably combustible.
Health
2
 
Flammability
1
 
 
Reactivity
0
 

Health.
Poison_Class
3
Exposure effects
Effects may be delayed.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed.
   Inhalation
May cause respiratory tract irritation. Can produce delayed pulmonary edema.
   Skin
Causes skin irritation. May cause contact dermatitis. Irritant dermatitis results from the direct injury to the skin and is characterized by redness and thickening of the affected areas.
   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.
   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.
UN number
2810
Response guide
HS Code
2930 90 70