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2-Bromo-2-nitro-1,3-propanediol structure
Chemical Name:
Molecular Formula:
Formula Weight:
MOL File:

2-Bromo-2-nitro-1,3-propanediol Properties

Melting point:
130-133 °C(lit.)
2.0002 (rough estimate)
refractive index 
1.6200 (estimate)
Flash point:
H2O: soluble100mg/mL, clear, colorless to faintly yellow
Crystals or Crystalline Powder
White to yellow
Water Solubility 
25 g/100 mL (22 ºC)
Stable. Hygroscopic. Incompatible with strong oxidizing agents, strong bases, strong reducing agents, acid chlorides and anhydrides, moisture.
CAS DataBase Reference
52-51-7(CAS DataBase Reference)
NIST Chemistry Reference
EPA Substance Registry System
1,3-Propanediol, 2-bromo-2-nitro-(52-51-7)
  • Risk and Safety Statements
Signal word  Danger
Hazard statements  H228-H373-H400-H411-H302+H312-H315-H318-H335-H410-H301-H312-H331
Precautionary statements  P210-P240-P241-P260-P264-P270-P271-P301+P312+P330-P302+P352+P312+P362+P364-P304+P340+P312-P314-P391-P403+P233-P405-P273-P280-P302+P352+P312-P305+P351+P338+P310-P501-P261-P301+P310a-P305+P351+P338-P501a
Hazard Codes  Xn,N
Risk Statements  21/22-37/38-41-50
Safety Statements  26-37/39-61-36/37/39
RIDADR  UN 3241 4.1/PG 3
WGK Germany  2
RTECS  TY3385000
HazardClass  4.1
PackingGroup  III
HS Code  29055999
Toxicity LD50 in mice, rats (mg/kg): 350, 400 orally (Croshaw)

2-Bromo-2-nitro-1,3-propanediol price More Price(8)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 134708 2-Bromo-2-nitro-1,3-propanediol 98% 52-51-7 25g $28.7 2018-11-22 Buy
Sigma-Aldrich 134708 2-Bromo-2-nitro-1,3-propanediol 98% 52-51-7 100g $89.1 2018-11-22 Buy
TCI Chemical B1247 2-Bromo-2-nitro-1,3-propanediol >98.0%(T) 52-51-7 25g $26 2018-11-22 Buy
TCI Chemical B1247 2-Bromo-2-nitro-1,3-propanediol >98.0%(T) 52-51-7 100g $78 2018-11-22 Buy
Alfa Aesar A11639 2-Bromo-2-nitropropane-1,3-diol, 98+% 52-51-7 100g $79.2 2018-11-13 Buy

2-Bromo-2-nitro-1,3-propanediol Chemical Properties,Uses,Production

Chemical Properties

off-white crystalline powder

Chemical Properties

Bronopol is a white or almost white crystalline powder; odorless or with a faint characteristic odor.


Preservative in cosmetics and toiletries. Antiseptic.

Production Methods

Bronopol is synthesized by the reaction of nitromethane with paraformaldehyde in an alkaline environment, followed by bromination. After crystallization, bronopol powder may be milled to produce a powder of the required fineness.

General Description

White crystals. Ignite easily and burn readily. May detonate under strong shock. Decomposes when heated, evolving toxic gases. Toxic by skin absorption, inhalation or ingestion.

Air & Water Reactions

Highly flammable. Water soluble.

Reactivity Profile

Incompatible with strong oxidizing agents, strong bases, strong reducing agents, acid chlorides and acid anhydrides. 2-Bromo-2-nitro-1,3-propanediol is also incompatible with sulfhydryl compounds or with aluminum or iron containers (it is stable in contact with tin or stainless steel).


Toxic by all routes of exposure; skin irritant.

Health Hazard

Fire may produce irritating and/or toxic gases. Contact may cause burns to skin and eyes. Contact with molten substance may cause severe burns to skin and eyes. Runoff from fire control may cause pollution.

Fire Hazard

Flammable/combustible material. May be ignited by friction, heat, sparks or flames. Some may burn rapidly with flare burning effect. Powders, dusts, shavings, borings, turnings or cuttings may explode or burn with explosive violence. Substance may be transported in a molten form at a temperature that may be above its flash point. May re-ignite after fire is extinguished.

Pharmaceutical Applications

Bronopol 0.01–0.1% w/v is used as an antimicrobial preservative either alone or in combination with other preservatives in topical pharmaceutical formulations, cosmetics, and toiletries; the usual concentration is 0.02% w/v.

Contact allergens

Bronopol is a preservative sometimes considered as a formaldehyde releaser. It was reported to be an allergen in cosmetics, cleaning agents, dairy workers, and a lubricant jelly used for ultrasound examination.

Safety Profile

Poison by ingestion, subcutaneous, intravenous, and intraperitoneal routes. Moderately toxic by skin contact. An eye and human skin irritant. An antiseptic. When heated to decomposition it emits very toxic fumes of NOx, and Br-.


Bronopol is used widely in topical pharmaceutical formulations and cosmetics as an antimicrobial preservative.
Although bronopol has been reported to cause both irritant and hypersensitivity adverse reactions following topical use, it is generally regarded as a nonirritant and nonsensitizing material at concentrations up to 0.1% w/v. At a concentration of 0.02% w/v, bronopol is frequently used as a preservative in ‘hypoallergenic’ formulations.
Animal toxicity studies have shown no evidence of phototoxicity or tumor occurrence when bronopol is applied to rodents topically or administered orally; and there is no in vitro or in vivo evidence of mutagenicity; this is despite the demonstrated potential of bronopol to liberate nitrite on decomposition, which in the presence of certain amines may generate nitrosamines. Formation of nitrosamines in formulations containing amines may be reduced by limiting the concentration of bronopol to 0.01% w/v and including an antioxidant such as 0.2% w/v alpha tocopherol or 0.05% w/v butylated hydroxytoluene;(14) other inhibitor systems may also be appropriate.
LD50 (dog, oral): 250 mg/kg
LD50 (mouse, IP): 15.5 mg/kg
LD50 (mouse, IV): 48 mg/kg
LD50 (mouse, oral): 270 mg/kg
LD50 (mouse, SC): 116 mg/kg
LD50 (mouse, skin): 4.75 g/kg
LD50 (rat, IP): 26 mg/kg
LD50 (rat, IV): 37.4 mg/kg
LD50 (rat, oral): 180 mg/kg
LD50 (rat, SC): 170 mg/kg
LD50 (rat, skin): 1.6 g/kg


Bronopol is stable and its antimicrobial activity is practically unaffected when stored as a solid at room temperature and ambient relative humidity for up to 2 years.
The pH of a 1.0% w/v aqueous solution is 5.0–6.0 and falls slowly during storage; solutions are more stable in acid conditions.
Microbiological assay results indicate longer half-lives than those obtained by HPLC and thus suggest that degradation products may contribute to antimicrobial activity. Formaldehyde and nitrites are among the decomposition products, but formaldehyde arises in such low concentrations that its antimicrobial effect is not likely to be significant. On exposure to light, especially under alkaline conditions, solutions become yellow or brown-colored but the degree of discoloration does not directly correlate with loss of antimicrobial activity.
The bulk material should be stored in a well-closed, nonaluminum container protected from light, in a cool, dry place.


Sulfhydryl compounds cause significant reductions in the activity of bronopol, and cysteine hydrochloride may be used as the deactivating agent in preservative efficacy tests; lecithin/polysorbate combinations are unsuitable for this purpose. Bronopol is incompatible with sodium thiosulfate, with sodium metabisulfite, and with amine oxide or protein hydrolysate surfactants. Owing to an incompatibility with aluminum, the use of aluminum in the packaging of products that contain bronopol should be avoided.

Regulatory Status

Included in topical pharmaceutical formulations licensed in Europe. Included in the Canadian List of Acceptable Non-medicinal Ingredients.

2-Bromo-2-nitro-1,3-propanediol Preparation Products And Raw materials

Raw materials

Preparation Products

2-Bromo-2-nitro-1,3-propanediol Suppliers

Global( 371)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Shenzhen Sendi Biotechnology Co.Ltd.
0755-23311925 18102838259
0755-23311925 CHINA 3194 55
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 21714 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20672 55
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32447 55
Hubei XinRunde Chemical Co., Ltd.
+8615102730682; +8618874586545
02783214688 CHINA 535 55
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418684 18949823763
86-0551-65418684 China 1861 55
career henan chemical co
+86-371-86658258 CHINA 30002 58
13867897135 CHINA 925 58
+86 18953170293
+86 0531-67809011 CHINA 2995 58
Chemwill Asia Co.,Ltd.
86-21-51861608;;; CHINA 23980 58

View Lastest Price from 2-Bromo-2-nitro-1,3-propanediol manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-08-21 2-Bromo-2-nitro-1,3-propanediol
US $7.00 / KG 1KG 99% 1000KG career henan chemical co

2-Bromo-2-nitro-1,3-propanediol Spectrum

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