Dibenzoylthiazyl disulfide
CAS Number
120-78-5
EC Number
204-424-9
Abbreviation
MBTS
Industries: Rubber & Elastomers
What is Dibenzoylthiazyl disulfide?
Dibenzoylthiazyl disulfide (CAS 120-78-5), known commercially as MBTS or Accelerator DM, is a sulfur-based vulcanization accelerator for rubber processing.
Where is Dibenzoylthiazyl disulfide used?
- Rubber processing: controls cure rate and crosslink density during vulcanization
- Primary accelerator in sulfur vulcanization of natural and synthetic rubbers, including SBR, NBR and EPDM
- Tire manufacturing: tread and sidewall compounds, balancing processing safety with cure efficiency
- Secondary accelerator in combination systems, typically paired with thiurams or guanidines
- Technical rubber articles such as seals and gaskets: fine-tuning scorch time and modulus
- Latex systems: biocide or preservation agent inhibiting microbial degradation during storage
- It delivers a delayed-action cure suitable for thick-section molded parts and industrial components.
Good to know: Also marketed as MBTS or Accelerator DM.
Commercial specifications
- Purity typically 95% or higher
- Bulk and packaged formats
Other Names (Synonyms)
2,2'-dithiobisbenzothiazole|Accelerator dm|Benzothiazyl disulfide (mbts)|2-(1,3-benzothiazol-2-yldisulfanyl)-1,3-benzothiazole|Benzothiazyl disulfide|MBTS
What are the physical properties of Dibenzoylthiazyl disulfide?
Melting Point 180 °C
Boiling Point 532.5±33.0 °C(Predicted)
Density 1.50 g/cm³
Flash Point 271°C
Appearance yellow amorphous powder
Color Cream to pale-yellow powder
Odor gray-wh. to cream powd. or pellets, sl. odor
Form powder to crystal
Water Solubility <0.01 g/100 mL at 21 ºC
Vapor Pressure 0Pa at 25℃
Refractive Index 1.5700 (estimate)
Log P 4.5 at 20℃
How is Dibenzoylthiazyl disulfide classified and handled safely? Learn More
Warning
GHS07· Irritant GHS09· Environmental Hazard
Hazard Statements
H317 May cause an allergic skin reaction
H400 Very toxic to aquatic life
H410 Very toxic to aquatic life with long lasting effects
Precautionary Statements
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P272 Contaminated work clothing should not be allowed out of the workplace.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
Which trade and regulatory codes apply to Dibenzoylthiazyl disulfide?
HS Code 29342020
UN Number 3077
ADR Class 9
Packing Group III
Storage Class 13 - Non Combustible Solids
WGK (Germany) 2