Introducing a Versatile Protecting Agent

Meet Bronopol – chemically known as 2-bromo-2-nitro-1,3-propanediol (that's CAS 52-51-7 for reference). Prized in industry as BNPD or Bioban BNPD-40, this crystalline powder often appears white to pale yellow. What really catches attention? Its broad-spectrum knockout punch against microbes, plus killer solubility. We're talking 25 grams smoothly dissolving in just 100mL of water at room temperature. And it doesn't quit across a useful pH range (4 to 9), whether fighting bacteria in cooling towers or keeping your shampoo fresh.

Properties That Define Performance

Pull up a lab stool. Bronopol (C₃H₆BrNO₄, 199.99 g/mol) presents as that crystalline solid we mentioned, melting around 130–133°C with a flash point north of 167°C. Density? Right at 2.00 g/cm³. Interestingly, its structure enables dissolution in alcohols and ethyl acetate, yet it plays harder to get with acetone, ether or benzene. When stored cool and dry under inert atmosphere, it’s remarkably stable – no wonder formulators bank on its staying power.

Where Bronopol Shines: Practical Frontlines

Fighting Microbes in Industrial Water Systems

Flocculant? Check. Biocide? Absolutely. Bronopol earns its keep controlling slime and gunk in cooling loops, paper mills, and flood-prone river intake systems. Plant operators notice it hammers Pseudomonas quickly and tackles other pathogenic bacteria without environmental guilt. Here’s the kicker: zero aldehydes. That means less toxicity baggage than older biocides, plus bonus corrosion protection for pipes and heat exchangers.

Personal Care & Agricultural Wins

Cosmetics formulators breathed easier when Bronopol joined the preservative squad in the 80s. FDA-cleared and gentle on skin even at 0.01–0.02% in shampoos or lotions, it’s particularly slick in emulsion systems packed with proteins and surfactants. Out in the fields? Seed treatments (800–1000 mg/L) reliably shield crops like cotton and rice from blight – all without harming delicate seedlings. Product developers appreciate this one-two punch of safety and power.

Why Bronopol Stays in the Toolkit 

For water treatment pros, cosmetics chemists, and ag specialists alike, Bronopol (BNPD, CAS 52-51-7) remains a smart choice. Its balance of solubility, stability, and microbial muscle tackles contamination without heavy toxic residue. Real-world results confirm: integration means tighter process control and cleaner end products. Still got questions about formulations? Our technical team’s ready with data sheets and application notes – just reach out.