Bronopol is a specialty cosmetic ingredient used as an antimicrobial preservative in suitable personal-care formulations. It is identified by the INCI name BRONOPOL, CAS Number 52-51-7, and EC Number 200-143-0. Its chemical name is 2-Bromo-2-nitropropane-1,3-diol, with molecular formula C₃H₆BrNO₄ and molecular weight 199.99 g/mol. Bronopol is generally supplied as a white to almost-white crystalline powder and is highly soluble in water.
As a specialty cosmetic preservative ingredient, Bronopol is used where microbial control is required in suitable water-containing formulations. Its antimicrobial function makes it relevant to personal-care manufacturing, although the finished-product use level must always be evaluated against the applicable cosmetic regulations and formulation requirements.
For companies searching for a Bronopol cosmetic ingredient manufacturer in India or Bronopol supplier in India, chemical identity, purity, impurity profile, physical properties, documentation and regulatory suitability are important factors when selecting the raw material.
Bronopol is a brominated nitro diol with the systematic name 2-bromo-2-nitropropane-1,3-diol. PubChem reports the molecular formula as C₃H₆BrNO₄ and molecular weight as 199.99 g/mol. Commercial and pharmacopoeial-style specifications describe it as a white or almost-white crystalline powder.
Reference specifications for Bronopol commonly include an assay of 99.0–101.0%, pH of a 1% aqueous solution around 5.0–7.0, water content not more than 0.5%, and a melting range around 123–131°C. One Indian specification sheet also reports related-substance limits for 2-methyl-2-nitropropane-1,3-diol, tris(hydroxymethyl)nitromethane and other impurities. These figures are reference specifications and should be matched to the actual SDP-approved grade before publication as a commercial COA.
Bronopol functions primarily as an antimicrobial and preservative ingredient. Its role is to help control microbial growth in susceptible cosmetic formulations and support product quality during storage and normal use.
For cosmetic formulation development, preservative performance depends on the complete product system. Factors such as formulation composition, pH, water phase, packaging, processing hygiene and interactions with other ingredients can influence the overall preservation strategy.
Bronopol also requires careful formulation assessment because its regulatory use is subject to specific restrictions. In the European Union, Bronopol is listed in Annex V as a preservative with a maximum concentration of 0.1% in finished cosmetic products, with the condition “Avoid formation of nitrosamines.” The EU also requires the applicable “releases formaldehyde” warning for finished products containing listed formaldehyde-releasing substances when the released formaldehyde exceeds 0.001% (10 ppm).
The 0.1% value is a finished-cosmetic limit, not the assay of the Bronopol raw material.
Bronopol can be considered for appropriate cosmetic and personal-care formulations where antimicrobial preservation is required. Its technical use includes applications in water-containing systems, and commercial references identify its use in cosmetics and personal-care products.
Depending on the formulation and applicable regulations, Bronopol may be evaluated in products such as shampoos, conditioners, creams, lotions and other personal-care formulations where a preservative system is required.
The final concentration and application should be determined from the current regulations of the target market and the validated preservation strategy for the finished product. Buyers sourcing Bronopol cosmetic ingredient in India should therefore distinguish between the raw-material purity specification and the finished-product regulatory limit.
Bronopol is freely soluble in water, making it suitable for incorporation into many aqueous formulation systems. Reference specifications commonly place the pH of a 1% aqueous solution around 5.0–7.0.
Formulators should consider the ingredient's compatibility with surfactants, conditioning agents, emulsifiers and other preservatives. Processing conditions, order of addition, temperature and formulation pH should be evaluated during development.
Particular attention should also be given to the interaction of Bronopol with amines and amide-containing ingredients, because regulatory references specifically require avoiding nitrosamine formation.
For commercial production, the supplied grade should be evaluated using the approved analytical specification. An assay value of 99.0–101.0% is commonly reported for BP-style material, but that assay is not automatically an HPLC assay. Therefore, the CMS Assay (HPLC) field should only contain an HPLC value when the actual SDP product is released using a validated HPLC method.
Businesses looking for a Bronopol cosmetic ingredient manufacturer in India should evaluate the raw material based on chemical identity, assay, appearance, water content, pH, impurity profile and batch-specific documentation.
A Bronopol cosmetic ingredient supplier in India can support procurement requirements through technical specifications, Certificate of Analysis, Safety Data Sheet, packaging information and batch traceability. For Bronopol manufacturing in India and commercial bulk supply, buyers may define their requirements for quantity, packaging, quality parameters and documentation according to the finished-product manufacturing process.
Companies searching for a Bronopol bulk cosmetic ingredient supplier in India should ensure that the selected specification matches the intended cosmetic application and destination-market regulatory requirements.
Swapnroop can position Bronopol as a specialty cosmetic ingredient for B2B personal-care formulation requirements, with focus on product identity, technical specifications and application suitability.
For buyers seeking a Bronopol cosmetic ingredient manufacturer and supplier in India, the product can be evaluated according to its preservative function, physical characteristics, quality documentation, formulation requirements and bulk sourcing needs. Technical specifications and batch documentation should be confirmed for the actual commercial material before production use.
| Parameter | Specification |
|---|---|
| Appearance | White or colourless crystals / white powder |