2,2'-Thiodiethanethiol

  • 2,2'-Dimercaptodiethyl sulfide
  • Bis(2-mercaptoethyl) sulfide
  • Bis(2-sulfanylethyl) sulfide
  • 1,4,7-Trithiaheptane
  • 1,5-Dimercapto-3-thiapentane
  • 1-Mercapto-2-(mercaptoethylthio)ethane
Formula
C4H10S3
Structure
Description
Liquid with a stench.

Registry Numbers and Inventories.
CAS
3570-55-6
EC (EINECS/ELINCS)
222-671-0
R: 20 36/37/38
S: 9 23 26 36/37
Canada DSL/NDSL
NDSL
US TSCA
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H10S3
Formula mass
154.32
Melting point, °C
-31
Boiling point, °C
276
Vapor pressure, mmHg
0.008 (25 C)
Density
1.183 g/cm3 (20 C)
Solubility in water
Insoluble
pKa/pKb
9.48 (pKa)
Partition coefficient, pKow
2.07
Heat of vaporization
49.4 kJ/mol

Hazards and Protection.
Storage
Keep container tightly sealed. Store in cool, dry conditions in well sealed containers.
Protection
Protective work clothing. Chemical protective gloves. Safety glasses or goggles.
Small spills/leaks
Absorb with liquid-binding material (sand, diatomite, acid binders, universal binders, sawdust).
Stability
Decomposition will not occur if used and stored according to specifications.
Incompatibilities
Oxidizing agents.

Fire.
Flash Point,°C
90
Fire fighting
Extinguish with carbon dioxide, extinguishing powder or water spray. Fight larger fires with water spray or alcohol resistant foam. Wear self-contained respirator. Wear fully protective impervious suit.
Combustion products
Carbon monoxide and carbon dioxide. Sulfur oxides (SOx). Hydrogen sulfide.
Health
2
 
Flammability
2
 
 
Reactivity
1
 

Health.
Exposure effects
Thiols/mercaptans are skin, eye and respiratory irritants. Inhalation can cause central nervous system effects. Strong penetrating odor acts to minimize inhalation exposure.

First aid
 
   Ingestion
Seek medical treatment.
   Inhalation
Supply fresh air. If required, provide artificial respiration. Keep patient warm. Seek immediate medical advice.
   Skin
Immediately wash with water and soap and rinse thoroughly. Seek immediate medical advice.
   Eyes
Rinse opened eye for several minutes under running water. Then consult a doctor.

Transport.