Also known as Ammonium fluosilicate, is a white crystalline powder.

Properties:

Formula: (NH₄) ₂SiF₆
Loss by Drying (105 °C) : 0.4% max.
Free Acid (as H₂SiF₆):0.8% max.
Water insoluble matter: 0.5% max.
Sulfate: 0.50% max.

CAS: 16919-19-0

HAZARD: Strong irritant. TLV (F): 2.5 mg/m³ of air.

USES:

• Light metal casting
• Mothproofing
• Laundry sour
• Glass Etching