Benzothiazole

CAS Number
95-16-9
EC Number
202-396-2
FEMA Number
FEMA 3256

What is Benzothiazole?

Benzothiazole (CAS 95-16-9), also known by the trade name Vangard BT, is a bicyclic heterocyclic compound. FEMA 3256.

Where is Benzothiazole used?

  • Rubber and tire manufacturing: key building block for benzothiazole-based vulcanization accelerators, influencing cure rates and compound performance
  • Chemical intermediate and precursor in the synthesis of accelerators, dyes, and biocidal agents
  • Flavor and fragrance: contributes nutty, slightly roasted notes to food and beverage applications
  • Textile and paper processing: dye intermediates and optical brighteners, with the heterocyclic core driving chromophore activity
  • Industrial preservation systems, including metalworking fluids and coating formulations, rely on benzothiazole-derived biocides that control microbial growth and extend product shelf life.

Good to know: Technical grade is standard for industrial and rubber applications; higher-purity grades meet flavor and fragrance requirements.

Commercial specifications

  • Packaged in drums or IBCs for bulk procurement

Other Names (Synonyms)

1,3-Benzothiazole|1-Thia-3-azaindene|Vangard BT|USAF EK-4812|O-2857|Benzothiazoline blends

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What are the physical properties of Benzothiazole?

Melting Point 2 °C
Boiling Point 227-228 °C @ Press: 765 Torr
Density 1.246 g/cm³ @ Temp: 20 °C
Flash Point >230 °F
Appearance yellow liquid with an unpleasant odour
Color Clear yellow-brown to brown
Odor odor of quinoline, sltly water-sol
Form Liquid
Water Solubility slightly soluble
Vapor Pressure 34 mm Hg ( 131 °C)
Refractive Index n 20/D 1.642(lit.)
Log P 2.01

How is Benzothiazole classified and handled safely? Learn More

Danger
GHS06· Toxic GHS07· Irritant

Hazard Statements

H301 Toxic if swallowed
H302 Harmful if swallowed
H310 Fatal in contact with skin
H311 Toxic in contact with skin

Precautionary Statements

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P262 Do not get in eyes, on skin, or on clothing.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.

Which trade and regulatory codes apply to Benzothiazole?

HS Code 29342080
WGK (Germany) 2
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