INTRODUCTION

3- Bromothianisole is a brominated aromatic  compound with an active methyl thio group for oxidation. It has many applications in pharmaceutical and biotech industries as an intermediate for the synthesis of various organic compounds. It also holds miscellaneous applications in medicinal chemistry, agrochemicals, and material science.

Manufacture

It is manufactured by diazotisation of 3-bromoanline.

Synonym1-Bromo-3-(methylthio)benzene,
3-Bromophenyl Methyl Sulfide
CAS no.33733-73-2
Molecular formulaC7H7BrS
Molecular weight203.1
Structure

Applications

APIs– 3-Bromothioanisole is used in synthesis of the following APIs:
Pridopidine, Sigma-1 receptor (S1R) agonist.
Pridopidine Hydrochloride used to investigational drug research for Huntington’s Disease (HD) and  Amyotrophic Lateral -Sclerosis (ALS) diseases.
Intermediates
1-Bromo-3-(methylsulfonyl)benzene
3-methylthiotriphenylamine
4-ethoxy-3′-methylthiostilbene
3-bromophenyl phenyl sulfide
9-substituted, 3,6-dithiomethylfluorenes
4-methoxy-3′-(methylthio)-1,1′-biphenyl

SPECIFICATIONS

TestUnitSpecifications
AppearanceClear colorless to yellow liquid
Purity by GC%Min 97.0

STORAGE

Stored at ambient temperature

PACKING

25 Kg HDPE Carboys

REACH Status

Not registered

ExSyn offers 3-Bromothioanisole on commercial scales and welcomes enquiries. No matter the quantity you need, our exceptional quality and service will make ExSyn your supplier of choice! If you need any additional information or SDS, please contact us.

More Products
In focus: Undecylenic acid, USP
Products in focus · 23/06/2026

Undecylenic acid is an unsaturated fatty acid naturally derived from castor oil. It is a colorless to pale yellow liquid with antifungal and antimicrobial properties. Chemically known as 10-undecenoic acid, it contains an 11-carbon chain with one double bond and is widely used in pharmaceuticals

READ MORE
In focus: 5-Nitro IsophthalicAcid (5-NIPA)
Products in focus · 16/06/2026

5-Nitro Isophthalic Acid (5-NIPA) is an aromatic organic compound derived from isophthalic acid. The presence of two carboxylic acid groups along with a nitro substituent at the 5-position makes it a valuable intermediate in the manufacture of fine chemicals, pharmaceuticals, dyes, pigments, and advanced materials.

READ MORE
In focus: Trichloroacetonitrile
Products in focus · 09/06/2026

Trichloroacetonitrile is a halogenated organic compound belonging to nitrile family. Its strong electrophilic character makes it a valuable intermediate in organic synthesis. It readily undergoes hydrolysis, particularly under acidic or basic conditions, yielding trichloroacetamide and related derivatives.

READ MORE
In focus: Zinc Dialkyl Dithio Phosphate
Products in focus · 02/06/2026

Zinc Dialkyl Dithio Phosphate (ZDDP) belongs to a  family of coordination compounds classified as members of transition metal dithiophosphate.

ZDDP is widely used based on a combination of different selected alcohols thus providing antiwear performance and enhanced thermal and hydrolytic stability. In combination with other additives, it is especially used for the formulation of hydraulic fluids, industrial gear oils, metalworking fluids, greases and automotive engine oils.

READ MORE
In focus: Dibutyl sulfide
Products in focus · 26/05/2026

Dibutyl sulfide is an organosulfur. It is a clear, colorless to pale yellow liquid characterized by a strong sulfur-like odor and is primarily used as an intermediate in chemical synthesis, specialty organic manufacturing, and research applications. The compound exhibits good solvency properties and moderate thermal stability, making it useful in industrial and laboratory processes involving sulfur-containing organic compounds.

READ MORE
In focus: Oleylamine
Products in focus · 19/05/2026

Oleylamine is a long-chain (C18) primary fatty amine derived from natural fatty acids, typically sourced from vegetable oils. It is produced from oleic acid through conversion of the carboxylic acid group (–COOH) into an amine group (–NH₂). With its optimal balance of hydrophobic chain length and reactive amine functionality it serves as a versatile and dependable building block for high-performance formulations.

READ MORE
In focus: Sodium Hyaluronate Ph. Eur.
Products in focus · 12/05/2026

Sodium Hyaluronate is the sodium salt of hyaluronic acid, a naturally occurring glycosaminoglycan known for its exceptional ability to retain moisture, along with its viscoelastic and biocompatible properties, making it highly valuable across pharmaceutical, cosmetic, and biomedical applications.

READ MORE
In focus: Pyrazinamide Ph. Eur.
Products in focus · 05/05/2026

Pyrazinamide is a first-line antitubercular drug used in combination therapy for the treatment of tuberculosis (TB). It is a synthetic pyrazine derivative and acts as a prodrug, which is converted into its active form (pyrazinoic acid) inside Mycobacterium tuberculosis.

READ MORE
In focus: 6-Bromopyridine-2,3-diamine
Products in focus · 28/04/2026

6-Bromopyridine-2,3-diamine is a heterocyclic organic compound belonging to the class of substituted pyridines. It is used mainly as an intermediate in pharmaceuticals and agrochemicals.

READ MORE