Benzododecinium chloride

CAS: 139-07-1

Overview

Benzododecinium chloride (CAS 139-07-1 ), also identified commercially as BAC-C12 and Cequartyl A, is a quaternary ammonium compound used as a cationic surfactant and broad-spectrum biocide across industrial and consumer markets.

It functions as both an antimicrobial preservative and an emulsification agent, making it relevant to formulators sourcing actives for preservation or surface-active performance in various chemical applications.

In water treatment, BAC-C12 controls microbial growth in cooling towers, industrial process water, and oilfield systems where biofilm formation is a persistent operational concern for facility managers.

Pharmaceutical and healthcare manufacturers incorporate it into topical antiseptic formulations, wound care products, and hard-surface disinfectants where regulatory-grade purity is a sourcing requirement for safety.

Personal care formulators use it in conditioning shampoos, skin sanitizers, and preservative systems where cationic activity also contributes to substantivity on hair and skin for improved product performance.

It is also applied in industrial cleaning concentrates where combined surfactancy and biocidal action reduces the need for multiple active ingredients, streamlining the manufacturing process and reducing costs.

Benzododecinium chloride is supplied as an aqueous solution, typically at 50% active content, though other concentrations are available depending on specific application requirements and formulation needs.

Technical and pharmaceutical grades are the most commonly sourced, with pharmaceutical-grade material meeting USP or Ph. Eur. specifications for use in regulated formulations and medical products.

Physical Properties

Melting Point	42 °C
Boiling Point	162.7°C[at 101 325 Pa]
Density	1.03[at 20℃]
Color	White to Off-White
Form	Solid
Water Solubility	2g/L at 20℃
Vapor Pressure	0Pa at 20℃
Log P	2.63

Safety & Handling

Danger GHS05 GHS07 GHS09 GHS08 GHS06 Hazard Statements H302 Harmful if swallowed H312 Harmful in contact with skin H314 Causes severe skin burns and eye damage H318 Causes serious eye damage H330 Fatal if inhaled H373 May causes damage to organs through prolonged or repeated exposure H400 Very toxic to aquatic life H410 Very toxic to aquatic life with long lasting effects H302+H312 Harmful if swallowed or in contact with skin Precautionary Statements P260 Do not breathe dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P284 In case of inadequate ventilation wear respiratory protection. P316 Get emergency medical help immediately. P317 Get emergency medical help. P319 Get medical advice/attention if you feel unwell. P320 Specific treatment is urgent (see … on this label). P321 Specific treatment (see … on this label). P330 Rinse mouth. P363 Wash contaminated clothing before reuse. P391 Collect spillage. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P301+P330+P331 Rinse mouth. Do NOT induce vomiting. P302+P361+P354 IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code	29239000
UN Number	3261
ADR Class	8
Packing Group	III
Storage Class	8A - Combustible corrosive hazardous materials
WGK (Germany)	2

Other Names

Industries

Water Treatment Pharmaceuticals & Healthcare Personal Care & Cosmetics