Aluminum Chlorohydrate (ACH)
ACH, Aluminum hydroxychloride, Dialuminum chloride pentahydroxide.
- CAS
- 12042-91-0
- EC
- 234-933-1
- Sectors
- Water & Wastewater Treatment, Personal Care & Cosmetics, Textiles, Leather & Paper
Aluminum Chlorohydrate (ACH), CAS 12042-91-0, is a highly concentrated inorganic coagulant salt with high basicity, supplied as a 50% aqueous solution or as a fine powder, and it is used as a primary coagulant in drinking water and wastewater treatment and as the active antiperspirant ingredient in personal care formulations. In water treatment, ACH offers superior turbidity removal compared to standard alum, requiring lower dosages and generating less sludge. It is a stable complex that functions efficiently across a wide pH range without significantly lowering water alkalinity. Its astringent properties allow it to form temporary gel plugs in sweat ducts, providing long-lasting moisture control.
Typical Properties
| Molecular formula | Al.Cl.HO |
|---|---|
| Molecular weight | 210.48 g/mol |
| Density | 1.95[at 20°C] |
| Grades available | Cosmetic Grade, Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Aluminum Chlorohydrate (ACH)
Applications
- Municipal Water Treatment: Primary coagulant for drinking water purification and phosphorus removal in wastewater.
- Cosmetic Formulations: Active antiperspirant agent in roll-ons, sprays, and cream-based deodorants.
- Pulp and Paper: Used for pitch control and as a sizing agent to improve paper surface quality.
Safety & Risks
Classified as Non-Hazardous for general transport but may cause Skin Irritation (Category 2). Use Protective Gloves and Safety Glasses during bulk industrial handling.
Packaging
25 kg Bags (Powder), 250 kg Drums, or 1250 kg IBC Tanks (Liquid).