Thioacetamide

  • Acetothioamide
  • Ethanethioamide
  • TAA
Formula
CH3CSNH2
Structure
Description
White crystals with a mercaptan odor.
Uses
As replacement for gaseous hydrogen sulfide in qualitative analysis.

Registry Numbers and Inventories.
CAS
62-55-5
EC (EINECS/ELINCS)
200-541-4
EC Index Number
616-026-00-6
EC Class
Carcinogenic Category 2; Harmful; Irritant; Dangerous for the Environment
R 45 22 36/38 52/53
S 53 45 61
RTECS
AC8925000
RTECS class
Tumorigen; Mutagen; Reproductive Effector
UN (DOT)
2811
Merck
12,9453
Beilstein/Gmelin
506006
Beilstein Reference
4-02-00-00565
RCRA
U218
Swiss Giftliste 1
G-4278
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C2H5NS
Formula mass
75.14
Boiling point, °C
112
Vapor pressure, mmHg
25 C)
Vapor density (air=1)
N/R
Odor Threshold Odor threshold 94.7 ppm
Density
1.336 g/cm3
Solubility in water
163 g/L
pKa/pKb
12.32 pKb)
Heat of vaporization
35.0 kJ/mol
Heat of combustion
-2033 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Keep containers tightly closed.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Do not get on skin or in eyes. Do not ingest or inhale.
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
Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions.
Disposal code
6
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Mineral acids.
Decomposition
Carbon monoxide, oxides of nitrogen, oxides of sulfur, carbon dioxide, hydrogen sulfide.

Fire.
Flash Point,°C
21
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam.
Fire potential
Combustible.
Hazards
Contact with metals may evolve flammable hydrogen gas.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL*: TWA 2 mg/m3 OSHA PEL*: TWA 2 mg/m3 [*Note: REL and PEL also apply to other inorganic tin compounds (as Sn) except tin oxides.] IDLH 100 mg/m3 (as Sn)
Carcinogin
I-2B, N-2, CP65
Poison_Class
1*
Exposure effects
Possible cancer hazard based on tests with laboratory animals. Chronic ingestion may cause liver damage. May cause reproductive and fetal effects.
   Ingestion
Harmful if swallowed. Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May cause liver damage. May cause tissue anoxia, characterized by weakness, headache, dizziness, confusion, cyanosis, weak and irregular heart beat, collapse, unconsciousness, convulsions, coma and death.
   Inhalation
May cause respiratory tract irritation. May cause effects similar to those described for ingestion.
   Skin
May be absorbed through the skin in harmful amounts. If absorbed, causes symptoms similar to those of ingestion.
   Eyes
May cause 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 immediately. Induce vomiting by giving one teaspoon of Syrup of Ipecac.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid immediately. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. SPEEDY ACTION IS CRITICAL!
   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
2811
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
TAM
 
HS Code
2930 90 70