Benzalkonium Chloride (In Water)
Benzalkonium Chloride is a quaternary ammonium compound with broad-spectrum antimicrobial properties used primarily as a preservative in ophthalmic and nasal preparations, as well as a topical antiseptic and disinfectant. It is commonly found in multi-dose eye drops, nasal sprays, and antiseptic solutions to prevent microbial contamination. This agent is for external and topical use only and is not administered systemically.
Benzalkonium Chloride is a topical antiseptic and preservative agent with antimicrobial activity, commonly used in eye drops, nasal sprays, and disinfectant solutions.
Key facts at a glance
- RxNorm
- 124073
- Generic
- Benzalkonium Chloride (In Water)
- Class
- pin-variant
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Used as a preservative in ophthalmic solutions (eye drops), nasal sprays, and topical medications to prevent bacterial contamination; also used as an antiseptic for skin disinfection and wound cleansing.
Functions as a cationic surfactant that disrupts microbial cell membranes, causing leakage of cellular contents and subsequent microbial death. Effective against bacteria, fungi, and certain viruses.
For topical and topical mucosa use only—avoid ingestion or injection. May cause irritation or hypersensitivity reactions in some individuals. Should not be used as a primary antiseptic for deep wounds or sterile surgical field preparation. When used as a preservative in eye drops, long-term use may cause ocular surface toxicity in sensitive patients.
Official drug label
WellAlly may earn a referral fee from linked resources at no extra cost to you. Editorial content is never influenced by commercial relationships.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 27, 2026. · Read our editorial policy