Stearalkonium chloride is a type of benzalkonium chloride which is used as an anti-static agent, a surfactant and an antimicrobial.^[1] It is an ingredient in some cosmetics and hair care products, particularly conditioners.^[2] It was originally designed by the fabric industry for use as a fabric softener.

Quick Facts Names, Identifiers ...

Stearalkonium chloride^[1]

Names
Preferred IUPAC name N-Benzyl-N,N-dimethyloctadecan-1-aminium chloride
Other names Dimethylbenzyloctadecylammonium chloride; Benzyldimethyloctadecylammonium chloride; Benzyldimethylstearylammonium chloride; Benzylstearyldimethylammonium chloride; N,N-dimethyl-n-octadecylbenzenemethanaminium chloride
Identifiers
CAS Number	122-19-0 Y
3D model (JSmol)	Interactive image
ChemSpider	28945 N
ECHA InfoCard	100.004.117
EC Number	204-527-9
PubChem CID	31204
UNII	0OUO26BB88 Y
CompTox Dashboard (EPA)	DTXSID2025139
InChI InChI=1S/C27H50N.ClH/c1-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-22-25-28(2,3)26-27-23-20-19-21-24-27;/h19-21,23-24H,4-18,22,25-26H2,1-3H3;1H/q+1;/p-1 N Key: SFVFIFLLYFPGHH-UHFFFAOYSA-M N InChI=1/C27H50N.ClH/c1-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-22-25-28(2,3)26-27-23-20-19-21-24-27;/h19-21,23-24H,4-18,22,25-26H2,1-3H3;1H/q+1;/p-1 Key: SFVFIFLLYFPGHH-REWHXWOFAD
SMILES CCCCCCCCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1.[Cl-]
Properties
Chemical formula	C27H50ClN
Molar mass	424.15 g·mol−1
Hazards
Lethal dose or concentration (LD, LC):
LD50 (median dose)	1250 mg/kg (oral, rat)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Close

Toxicology studies have determined that stearalkonium chloride is safe and non-toxic at the concentrations typically used in cosmetic products (0.1 to 5%).^[3] At higher concentrations (25% solution), it has been shown to cause minor skin and eye irritation in animals.^[3]

• Benzalkonium chloride – Surfactant and antiseptic agent
• Polyaminopropyl biguanide – chemical compoundPages displaying wikidata descriptions as a fallback, an alternative preservative for contact lens solutions
• Ethylenediaminetetraacetic acid – chemical compound used for industrial and chemical purposePages displaying wikidata descriptions as a fallback
• Triclosan – Antimicrobial agent
• Thiomersal – Organomercury antiseptic and antifungal agent