Preservatives & Biocides
REACH
Didecyldimethylammonium chloride
CAS Number
7173-51-5
EC Number
230-525-2
Abbreviation
DDAC
What is Didecyldimethylammonium chloride?
Didecyldimethylammonium chloride (CAS 7173-51-5), commonly known as DDAC, is a quaternary ammonium compound used as a broad-spectrum biocide and disinfectant.
Where is Didecyldimethylammonium chloride used?
- Food processing and beverage facilities: no-rinse sanitizers for food-contact surfaces
- Water treatment: microbial control in cooling towers, industrial water systems and swimming pools
- Healthcare and institutional cleaning: active ingredient in hospital-grade disinfectant concentrates and wipes
- Personal care: preservative systems for rinse-off and leave-on products
- It delivers antimicrobial action against bacteria, fungi and enveloped viruses at low use concentrations.
Good to know: Buyers should confirm active content and counterion purity when sourcing for regulated end-use applications.
Commercial specifications
- Aqueous solution, most commonly at 50% and 80% active concentrations
- Higher-purity grades for pharmaceutical and personal care formulations
Other Names (Synonyms)
quaternium 12|N-Decyl-N,N-dimethyl-1-decanaminium chloride|DDAC|Astop|Arquad 10|Britewood Q|Bardac 2250|1-Decanaminium, N-decyl-N,N-dimethyl-, chloride (1:1)
What are the physical properties of Didecyldimethylammonium chloride?
Melting Point 88 °C
Boiling Point 88°C/1013hPa
Density 0.87[at 20℃]
Appearance Liquid
Color Light Beige to Brown
Form Gel
Water Solubility 650mg/L at 25℃
Vapor Pressure 0.006Pa at 25℃
pH 6.5-8.0 (20°C, 10g/L in H2O)
Log P 2.8 at 20℃
How is Didecyldimethylammonium chloride classified and handled safely? Learn More
Danger
GHS05· Corrosive GHS07· Irritant GHS06· Toxic GHS09· Environmental Hazard GHS08· Health Hazard
Hazard Statements
H301 Toxic if swallowed
H302 Harmful if swallowed
H312 Harmful in contact with skin
H314 Causes severe skin burns and eye damage
Precautionary Statements
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
Which trade and regulatory codes apply to Didecyldimethylammonium chloride?
Storage Class 8A - Combustible corrosive hazardous materials
WGK (Germany) 2