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Rubber chemicals

Accelerator DM

Also known as 2,2'-Dithiobisbenzothiazole, MBTS, Benzothiazole disulfide

CAS 120-78-5Formula C14H8N2S4Molar mass 332.50 g/molEC 204-424-9
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 53 suppliers listed
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Accelerator DM chemical structure, C14H8N2S4, CAS 120-78-5
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Pale yellow needles from benzene
Melting point
180 °C
Density
Density (at 20 °C): 1.5 g/cm³
Flash point
257 °C
Solubility
INSOLUBLE IN WATER, AT 25 °C LESS THAN 0.5 G/100 ML ACETONE OR BENZENE, 0.2 G/100 ML CAR…
HS code
293420
Category
Rubber chemicals
UN number
UN 3077
Illustrative photo, off-white crystalline powder in an HDPE jar on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Accelerator DM?

Plain description, key identifiers and synonyms

Dibenzothiazol-2-yl disulfide is an organic disulfide resulting from the formal oxidative coupling of the thiol groups of two molecules of 1,3-benzothiazole-2-thiol. It is used as an accelerator in the rubber industry. It has a role as an allergen. It is an organic disulfide and a member of benzothiazoles. It is functionally related to a 1,3-benzothiazole-2-thiol.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-(1,3-benzothiazol-2-yldisulfanyl)-1,3-benzothiazole
CAS number
120-78-5 CAS number cross-checked
EC number
204-424-9
Molecular formula
C14H8N2S4
UNII
6OK753033Z
MDL number
MFCD00022874
InChIKey
AFZSMODLJJCVPP-UHFFFAOYSA-N
InChI
InChI=1S/C14H8N2S4/c1-3-7-11-9(5-1)15-13(17-11)19-20-14-16-10-6-2-4-8-12(10)18-14/h1-8H
SMILES (canonical and isomeric)
C1=CC=C2C(=C1)N=C(S2)SSC3=NC4=CC=CC=C4S3

Synonyms

  • 2,2'-Dithiobisbenzothiazole
  • MBTS
  • Benzothiazole disulfide
  • Dibenzothiazolyl disulfide
  • Vulkacit DM
  • Pneumax DM
  • Vulcafor MBTS
  • 2,2'-Dibenzothiazyl disulfide
  • Benzothiazolyl disulfide
  • Bis(2-benzothiazyl) disulfide
  • Ekagom GS
  • Dibenzoylthiazyl disulfide
  • Accel TM
  • Vulkacit DM/C
  • Bis(benzothiazolyl) disulfide
  • 2,2'-Benzothiazyl disulfide
  • Royal MBTS
  • Dibenzothiazolyl disulphide
  • 2-Benzothiazolyl disulfide
  • Bis(2-benzothiazolyl) disulfide
  • Dibenzthiazyl disulfide
  • MBTS rubber accelerator
  • Benzothiazole, 2,2'-dithiobis-
  • Vulkacit dm/mgc
  • 2-Benzothiazyl disulfide
Show all 38 synonyms
  • 2-Mercaptobenzothiazyl disulfide
  • Dithiobis(benzothiazole)
  • Mercaptobenzthiazyl ether
  • Di-2-benzothiazolyl disulfide
  • 2,2'-Bis(benzothiazolyl) disulfide
  • BTS-SBT
  • Dwusiarczek dwubenzotiazylu
  • Di(benzothiazol-2-yl) disulphide
  • di(1,3-benzothiazol-2-yl) disulfide
  • DBTD
  • 2,2'-Dithiobis(benzothiazole)
  • Thiofide
  • Dibenzothiazyl disulfide

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Pale yellow needles from benzeneexp.
Odour
ODORLESSexp.
Melting point
180 °Cexp.
Density
Density (at 20 °C): 1.5 g/cm³exp.
Flash point
257 °Cexp.
Solubility
INSOLUBLE IN WATER, AT 25 °C LESS THAN 0.5 G/100 ML ACETONE OR BENZENE, 0.2 G/100 ML CARBON TETRACHLORIDE, 0.5 G/100 ML NAPHTHA, 0.2 G/100 ML ALCOHOL, 0.2 G/100 ML ETHER, SOMEWHAT MORE SOL IN CHLOROFORM THAN CARBON TETRACHLORIDEexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
332.50 g/molcalc.
Exact mass
331.957 Dacalc.
LogP (octanol/water)
5.71calc.
Topological polar surface area
25.78 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
6calc.
Rotatable bonds
3calc.
Heavy atoms
20calc.
Rings
4calc.
Aromatic rings
4calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (1 violation)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccc2sc(SSc3nc4ccccc4s3)nc2c1

c1ccc2sc(SSc3nc4ccccc4s3)nc2c1

4 rings, 20 atoms. This chemical is the scaffold itself.

8 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H317May cause an allergic skin reaction.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (10)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3077
Transport hazard class
9
Packing group
III

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Accelerator DM suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 53 suppliers
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Where suppliers are based

53 suppliers in 9 countries

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Accelerator DM price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Accelerator for natural rubber, styrene-butadiene rubber, nitrile-butadiene rubber, butadiene rubber & for synthetic isoprene rubber.

Retarder in neoprene.

Gives flat, moderately fast curves in natural and synthetic rubber, used for general mechanicals and white stocks, plasticizer/retarder in polychloroprene.

Industrial uses: Catalyst, Processing aids not otherwise specified, Polymerization promoter, Other, Chemical reaction regulator.

Consumer uses: Other, Polymerization promoter, Processing aids not otherwise specified, Catalyst.

Roles

  • aetiopathogenetic role
  • allergen

Functional uses

  • Catalyst
  • Chemical reaction regulator
  • Dispersing agent
  • Plasticizer

Pharmacology

2,2'-dithiobisbenzothiazole is a Standardized Chemical Allergen. The physiologic effect of 2,2'-dithiobisbenzothiazole is by means of Increased Histamine Release and Cell-mediated Immunity.

How it is made

Oxidation of 2-mercaptobenzothiazole

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 613-135-00-0

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Accelerator DM is traded under.

HS 2934.20Indicative HS code

Compounds containing in the structure a benzothiazole ring-system (whether or not…

World exports in 2024
$662M
+4.3% vs 2023, imports $630M
2019 to 2024
Top exporters
  1. China62.9%
  2. Belgium14.6%
  3. United States5.4%
Top importers
  1. India * partner reported18.5%
  2. United States18.1%
  3. Brazil6.7%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Accelerator DM is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Accelerator DM, based on the data on this page

What is Accelerator DM?

Dibenzothiazol-2-yl disulfide is an organic disulfide resulting from the formal oxidative coupling of the thiol groups of two molecules of 1,3-benzothiazole-2-thiol. It is used as an accelerator in the rubber industry. It has a role as an allergen. It is an organic disulfide and a member of benzothiazoles.

What is the CAS number of Accelerator DM?

The CAS registry number of Accelerator DM is 120-78-5.

What is the molecular formula and weight of Accelerator DM?

The molecular formula of Accelerator DM is C14H8N2S4 and its molar mass is 332.50 g/mol.

What is Accelerator DM used for?

Accelerator for natural rubber, styrene-butadiene rubber, nitrile-butadiene rubber, butadiene rubber & for synthetic isoprene rubber. Retarder in neoprene. Gives flat, moderately fast curves in natural and synthetic rubber, used for general mechanicals and white stocks, plasticizer/retarder in polychloroprene.

Is Accelerator DM hazardous?

Accelerator DM carries the GHS signal word "Warning". Main hazards: may cause an allergic skin reaction, very toxic to aquatic life, very toxic to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Accelerator DM?

Accelerator DM is usually classified under HS code 293420 (Compounds containing in the structure a benzothiazole ring-system (whether or not…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Accelerator DM?

CompoundList lists 53 suppliers of Accelerator DM in China, United States, India, Japan and 5 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Accelerator DM in India?

4 suppliers in India list Accelerator DM on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Accelerator DM?

Suppliers quote Accelerator DM on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Accelerator DM

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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