Pyridine hydrobromide is a white to off-white hygroscopic crystalline solid with melting point/freezing point of 216 °C to 219 °C. It is miscible in water. It used in many chemical synthesis studies.

It is manufactured by the reaction of pyridine with hydrogen bromide.

SynonymsPyridinium bromide
CAS no.18820-82-1
EINECS no.242-600-7
Molecular formulaC5H6BrN
Molecular weight160.01


Pyridine hydrobromide is used as an intermediate in the chemical industry for the manufacturing of active pharmaceutical ingredients like antibiotics, Cephalosporin & Cephalexin.
Also used in Mouthwash (Oral care), Skin Cream (Cosmetic).
It is quite useful for bromination of ketones.
It is used as an electrolyte in the electrochemical cells. It has been shown to inhibit the activity of cytochrome P450 enzymes, which are important for the metabolism of xenobiotic compounds.
Pyridine hydrobromide has also been shown to have synergistic effects with other drugs, such as sodium carbonate and l-arabinose, in inhibiting the growth of bacteria in vitro and in vivo.
This compound is also able to form acid complexes with metal ions such as zinc and copper, which may be useful for therapeutic purposes where coordination geometry is important.


DescriptionWhite to off-white to pale brown crystalline powder, Hygroscopic. Faint odour of Pyridine
Identification (by Chemical)Pale yellow precipitate should be formed
SolubilityFreely soluble in Methanol, Ethanol and Water
pH (5% solution)w/v2.0 – 3.0
Water (by KF)%NMT 0.2
Melting Point°C216 – 219
Free Pyridine% w/wNMT 0.3
Assay (by Titration)%99.0 – 101.0

Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Store away from strong oxidizing agents, water, moisture.

50 kg HDPE drum.

REACH Status
Not registered yet.

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: Pyrophosphoryl Chloride
Products in focus · 29/11/2022

Pyrophosphoryl chloride is colourless to pale yellow liquid, reasonably easy to handle. It reacts violently with water & miscible with most organic solvents.
It is used in pharmaceutical and other organic synthesis, as laser materials and electronic components.

In focus: Benzilic Acid Ethyl Ester
Products in focus · 22/11/2022

Benzilic acid ethyl ester is an oil organic liquid. Its reactivity is attributed to the presence of the hydroxyl group at alpha-position to the carboxylic acid group and hence it participates in various reactions leading to value-added intermediates and APIs.

In focus: Bromobenzene
Products in focus · 15/11/2022

Bromobenzene, an aryl halide, is a clear, colorless liquid with a pleasant odor. It is soluble in methanol and diethyl ether, and very slightly soluble in cold water.

In focus: Dibutyltin Dilaurate
Products in focus · 08/11/2022

Dibutyltin laurate is an organotin compound with oily appearance. The lauric acid ester is used in various industrial applications as catalyst.

In focus: Chrysanthemic acid
Products in focus · 25/10/2022

Chrysanthemic acid is a cyclic organic compound. The product occurs naturally in its ester form in pyrethrum flowers. It is also found as metabolite of pyrenthrins. The acid carries a sweet odor thereby enabling its uses in flavors and is used to synthesize agrochemicals as well.

In focus: Propionic Anhydride
Products in focus · 18/10/2022

Propionic Anhydride is a colorless liquid having a pungent odor and high boiling point. It is miscible with most organic solvents. It is soluble in both water and alcohol. It is a widely used reagent in organic synthesis as well as for producing specialty derivatives of cellulose.

In focus: 2-Cyclohexene-1-one
Products in focus · 11/10/2022

2-Cyclohexene-1-one is an organic intermediate used in synthesis of pharmaceuticals, agrochemicals, and fragrances. It is a ketone, or more precisely, an enone.

In focus: Colchicine
Products in focus · 04/10/2022

It is an alkaloid used in the symptomatic relief of pain in attacks of gouty arthritis, pseudogout, sarcodial arthritis, calcific tendinitis and to treat the inflammatory symptoms of Familial Mediterranean Fever.
It appears as odourless or nearly odourless pale yellow needles or powder that darkens on exposure to light.

In focus: N-Acetyl-L-Aspartic Acid
Products in focus · 27/09/2022

N-Acetyl-L-aspartic acid, abbreviated as NAA, is second most abundant molecule in nervous systems after amino acid glutamate. It is synthesized in brain from aspartic acid and acetyl co-enzyme A. It also acts as nutrient.