Thiram

  • Tetramethylthioperoxydicarbonicdiamine
  • Tetramethylthirium disulfide
  • bis(dimethylthiocarbamyl)disulfide
Formula
C6H12N2S4
Structure
Description
White to yellowish to greyish powder or crystals, characteristic odor.
Uses
Fungicide for large brown patch snowmold and dollar spot on fine turfs.

Registry Numbers and Inventories.
CAS
137-26-8
EC (EINECS/ELINCS)
205-286-2
EC Index Number
006-005-00-4
EC Class
Mutagenic Category 3; Harmful; Irritant; Sensitising
R 20/22 36/37 43 68
RTECS
JO1400000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Drug; Mutagen; Reproductive Effector; Human Data; Primary Irritant
UN (DOT)
2771
Merck
12,9510
Beilstein/Gmelin
1725821
Beilstein Reference
4-04-00-00242
RCRA
U244
EPA OPP
79801
Swiss Giftliste 1
G-2947
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C6H12N2S4
Formula mass
240.43
Melting point, °C
148 - 152
Boiling point, °C
307
Vapor pressure, mmHg
0.0007 (25 C)
Saturation Concentration
Very low based on vapour pressure at 20 C
Odor Threshold Odor threshold 5 mg/m3
Density
1.426 g/cm3
Solubility in water
30 mg/L
pKa/pKb
13.18 (pKb)
Partition coefficient, pKow
1.76
Heat of vaporization
54.8 kJ/mol

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. Remove contaminated clothing and wash before reuse. 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 and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
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
Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Acids - oxidizing agents - reducing agents.
Decomposition
Nitrogen oxides, carbon monoxide, oxides of sulfur, irritating and toxic fumes and gases, carbon dioxide, nitrogen.

Fire.
Flash Point,°C
139
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. Use water spray to keep fire-exposed containers cool. Use extinguishing media appropriate to the surrounding fire. Substance is noncombustible. Containers may explode when heated. Extinguishing media: Do NOT get water inside containers. For small fires, use dry chemical, carbon dioxide, or water spray. For large fires, use water spray, fog or regular foam. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
Non-Combustible
Combustion products
Toxic and irritating oxides of sulfur are formed.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV: ppm; 1 mg/m3 (ACGIH 1991-1992). PDK: 0.5 mg/m3 P (USSR 1991). OSHA PEL: TWA 5 mg/m3 NIOSH REL: TWA 5 mg/m3 NIOSH IDLH: 100 mg/m3
Poison_Class
3
Exposure effects
Repeated or prolonged exposure may cause allergic reactions in sensitive individuals.
   Ingestion
Harmful if swallowed. May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
Harmful if inhaled. Causes respiratory tract irritation.
   Skin
May cause skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   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. 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
2771
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
THR
 
HS Code
2930 30 00
 
Std. Transport #
4962537