Bronopol used for daily chemicals, household, water treatment
Bronopol is with the chemical name 2-bromo-2-nitro-1,3-propanediol, also known as bromide, BNPD. The pure Bronopol is white to light yellow crystalline powder with a melting point of 120°C to 122°C. It is easily soluble in polar solvents such as water, ethanol and propylene glycol, but hardly soluble in non-polar solvents such as chloroform, acetone and benzene. It is easy to decompose when the pH is greater than 8 and high temperature, and will produce yellow under light, which is corrosive to aluminum. Bronopol is a broad-spectrum bactericide of bromonitro alcohol. It has high bactericidal activity, low concentration and a wide pH range. It has no irritation and no sensitization to human skin. It is American One of the cosmetic preservatives approved by the FDA.
Bronopol has its advantages:
(l) High efficiency.
It has broad-spectrum antibacterial activity, can inhibit the growth of most bacteria at a concentration of 25ppm, and has a better effect on Gram-negative bacteria and various pseudomonas;
(2) Low dosage and low price.
In cosmetics, the amount of Bropol is generally 0.01~0.05%, which is one-tenth of the parabens, which are commonly used in cosmetics, and the cost of use is more than half cheaper than parabens;
(3) Good compatibility.
Nutritional ingredients such as protein and various cationic, anionic and nonionic surfactants will not affect the antibacterial effect of bronopol;
(4) Suitable pH range.
Bronopol is effective in the pH range of 4-9, that is, in a weakly acidic, neutral and alkalescent environment, bronopol can maintain a strong antibacterial effect after adding bronopol;
(5) Good water solubility and easy to use.
Bronopol is easy to dissolve in water, and its solubility in water at 25°C is 25g, which is very convenient to use.
Application:
1) Cosmetic bactericide:
Bronopol has an inhibitory effect on bacteria, molds, and yeasts, but has poor inhibitory activity on molds and yeasts. The use of paraben with paraben can enhance the inhibitory effect on molds and yeasts. Its recommended concentration in cosmetics is 0.02%. In cosmetics, it is mainly used as a preservative for medicated skin creams, medicated shampoos, baby baths and so on.
2) Water treatment bactericide:
Bronopol can be compounded with cationic polyquaternary ammonium salts and other compounds to form a new type of bactericide. Add it to industrial cooling water, pulp and paper manufacturing water treatment to improve the bactericidal effect. Completely prevent the formation of Klebsiella pneumoniae.
3) Petroleum industry fungicides:
Bronopol and surfactants are made into strips and blocks of solid fungicides, which can control the growth of microorganisms in oil well water, and can be dispersed and dissolved in water but not dissolved in oil, so it can enter the bottom of the petroleum system Kill bacteria in the water layer, thereby effectively inhibiting the corrosion of metal workpieces.
4) Deodorant:
The toilet air deodorant based on bronopol can kill fungi and scale insects at a very low concentration, and can also effectively remove ammonia, hydrogen sulfide and mercaptans in the toilet air and water. The nitryl alcohol is odorless and low in price. The deodorant used as a fungicide can be used not only in household toilets, but also in deodorizing liquids with unpleasant odors in garbage disposal.
5) Pharmaceutical industry:
In the pharmaceutical industry, bronopol can be used as an external bactericide, as well as an oral preservative for the treatment of gastritis; bronopol as a bactericide in the mastitis formula can effectively kill staphylococci. So as to control mastitis.
6) Other fields:
In addition to the above-mentioned broad application fields, bronopol can also be used as a softener component of textiles, leather preservatives, preservatives for lubricating cooling liquids, preservatives for cut flowers, preservatives for vegetable storage, and antiseptic foam polychloride Raw materials, etc.
