Bronopol 1 kg

Why bulk manufacturers rely on this preservative for water-based systems

Bronopol is a preservative whose demand extends far beyond skincare formulations. It is widely used in metalworking fluids to prevent bacterial contamination of coolants, in latex paints, adhesives, drilling muds, and household chemical products where the aqueous phase must stay stable over long storage periods. The 1 kg packaging is aimed primarily at manufacturers who need a consistent volume of raw material for continuous production runs rather than small trial batches. This item belongs to the Preservatives and Antioxidants section, which brings together ingredients designed to protect formulations from microbial spoilage and oxidative degradation.

The active compound in bronopol shows strong activity against both gram-positive and gram-negative bacteria, which is why it performs particularly well in water-rich systems where bacterial contamination poses the greater risk compared to fungal growth. For broader spectrum protection, manufacturers often pair it with agents offering stronger fungicidal action, such as SynerCide Asian Fusion or Suttocide A, both of which complement the protective profile and allow each individual preservative to be used at a lower concentration.

The recommended usage level typically ranges from 0.01 to 0.1 percent of the total formula weight. Exceeding the upper limit does not improve efficacy but does increase the likelihood of skin and mucous membrane irritation. The compound should be added to the water phase during the cooling stage, at temperatures not exceeding 60 degrees Celsius, ideally below 45 degrees, since prolonged heat exposure can gradually break down the molecule and release trace amounts of formaldehyde. Controlling the addition temperature is the key technical point when working with this preservative on industrial lines.

Bronopol remains stable across a wide pH range, making it suitable for emulsions, gels, shampoos, conditioners, water-based color cosmetics, as well as industrial dispersions and latex compounds. In skincare formulations it is frequently combined with soothing ingredients such as D-Panthenol 50P, which helps offset the potential irritant effect of preservative systems and improves overall skin tolerance. When processing large batches, thorough mixing until complete dissolution is essential to avoid localized overheating and undissolved particles.

Store bronopol in a tightly sealed container, in a dry location away from direct sunlight, at room temperature, avoiding contact with metal surfaces and strong oxidizers. When storage conditions and dosage guidelines are followed, the product retains its stated effectiveness throughout the full shelf life, which is particularly important for facilities operating long production cycles and holding raw material inventory.

Large-batch industrial lotion base with preservation

Distilled water 7500 g

Emulsified base oil 1400 g

Neutral emulsifier 650 g

Glycerin 380 g

Bronopol 8 g

D-Panthenol 18 g

Fragrance oil 12 g

Heat the water and oil phases separately to 70-75 degrees Celsius, then combine them under continuous mixing until a uniform emulsion forms, and begin cooling. Once the temperature drops below 45 degrees, add bronopol and D-panthenol, stirring thoroughly until fully dissolved. Add the fragrance oil last at around 35 degrees, then transfer the finished lotion into storage tanks and allow it to stabilize for 24 hours before quality control checks.