Didecyl dimethyl ammonium chloride 7173-51-5

Product Name: Didecyl dimethyl ammonium chloride
English Alias: DDAC; Di-n-decyl dimethyl ammonium chloride; Didecyldimonium chloride
CAS Number: 7173-51-5
Molecular Formula: C₂₂H₄₈ClN
Appearance: Clear, pale yellow to colorless viscous liquid
Package: 25 kg / drum, 50 kg / drum, or 180 kg / drum

What is Didecyl dimethyl ammonium chloride？

Didecyl dimethyl ammonium chloride (DDAC) is a quaternary ammonium compound and a cationic surfactant. It typically presents as a clear, pale yellow viscous liquid. It is readily soluble in water and polar organic solvents. DDAC is known for its potent broad-spectrum antimicrobial efficacy against bacteria, fungi, and viruses. It also possesses excellent properties as a disinfectant, sanitizer, algicide, and softening agent. It is stable under normal storage conditions.

COA (Certificate of Analysis):

Item	Standard	Result
Appearance	Colourless to light yellow clear liquid	Colourless clear liquid
Active Content	0.8	80.18%
pH of 10% water solution	5-9	7.4
Free amine and its salt(w/w)	≤2.0%	1.6
Color,APHA	≤150#	140
Conclusion and Remark	PASS	1

Application:

1. Disinfectant & Sanitizer: Widely used as an active ingredient in industrial, institutional, agricultural, and veterinary disinfectants and sanitizers for surface cleaning.

2. Algicide & Microbiocide: Effective control of algae and microbes in industrial water treatment systems, swimming pools, and pulp/paper mills.

3. Surface Active Agent: Used as a softening agent, emulsifier, dispersant, and antistatic agent in various industrial processes.

4. Preservative: Finds application as a wood preservative and in some material protection formulations to prevent microbial degradation.

Safety Profile:

Didecyl dimethyl ammonium chloride is a cationic surfactant. It is harmful if swallowed and causes severe skin burns and eye damage. It may cause an allergic skin reaction. Appropriate personal protective equipment (PPE), including chemical-resistant gloves, protective clothing, and eye/face protection, is essential when handling. Avoid breathing mist/vapors/aerosols. The substance is very toxic to aquatic life with long-lasting effects. Environmental release must be prevented. In case of contact, immediately rinse affected areas thoroughly with water and seek medical advice/attention. Always refer to the full Safety Data Sheet (SDS) for comprehensive handling, storage, and disposal guidelines.

Storage Requirements:

Store in a cool, dry, well-ventilated place.

Keep the container tightly closed.

Protect from physical damage, extreme heat, and direct sunlight.

Relative humidity < 80% is recommended.

Protect the product against influences of weather and contamination.

Transport & Packaging:

Didecyl dimethyl ammonium chloride for technical applications is supplied in securely closed high-density polyethylene (HDPE) or polypropylene (PP) drums of various sizes (e.g., 25 kg, 50 kg, 180 kg). Ensure packaging is intact and upright during transport to prevent leakage.