4,4'-Thiobis(6-tert-butyl-m-cresol)

  • 4,4'-Thiobis(3-methyl-6-tert-butyl phenol)
  • Bis(2-methyl-4-hydroxy-5-tert-butylphenyl) sulfide
  • 2,2'-Di-tert-butyl-5,5'-dimethyl-4,4'-thiodiphenol
  • 1,1'-Thiobis(2-methyl-4-hydroxy-5-tert-butyl)benzene
  • Santonox
  • Santowhite Crystals
Formula (2-(CH3)-4-(OH)-5-(CH3)3C)C6H2)2S
Structure
Description Light gray - tan powder. Slight aromatic odor.

Registry Numbers and Inventories.
CAS 96-69-5
EC (EINECS/ELINCS) 202-525-2
RTECS GP3150000
RTECS class Tumorigen
Beilstein/Gmelin 1147776
Beilstein Reference 4-06-00-06043
Swiss Giftliste 1 G-4194
Canada DSL/NDSL DSL
US TSCA Listed
Austrailia AICS Listed
New Zealand Listed
Japan ENCS (MITI) Listed

Properties.
Formula C22H30O2S
Formula mass 358.55
Melting point, °C 158 - 161
Density 1.10 g/cm3
Solubility in water Insoluble
pKa/pKb 10.44 (pKa)
Partition coefficient, pKow 7.74

Hazards and Protection.
Storage Do not store in direct sunlight. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling Remove contaminated clothing and wash before reuse. Minimize dust generation and accumulation. Avoid breathing dust, vapor, mist, or gas. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation.
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 Vacuum or sweep up material and place into a suitable disposal container. Reduce airborne dust and prevent scattering by moistening with water. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Remove all sources of ignition. Provide ventilation.
Disposal code 3
Stability Stable under normal temperatures and pressures.
Incompatibilities Strong oxidizing agents.
Decomposition Carbon monoxide, oxides of sulfur, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C 222
Autoignition, °C 402
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. This material in sufficient quantity and reduced particle size is capable of creating a dust explosion. Extinguishing media: Use extinguishing media most appropriate for the surrounding fire. Use dry chemical, carbon dioxide, or halogenated agents.
NFPA Health 1
  Flammability 0  
  Reactivity 0  

Health.
Poison_Class 4
Exposure effects Chronic exposure may cause liver damage.
   Ingestion May cause gastrointestinal irritation with nausea, vomiting and diarrhea. The toxicological properties of this substance have not been fully investigated.
   Inhalation Causes respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
   Skin Causes skin irritation.
   Eyes Causes eye irritation.

First aid		  
   Ingestion Do NOT induce vomiting. 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 Immediately 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. If irritation develops, get medical aid.

Transport.
HS Code 2930 90 70