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Magnesium Fluoride (MgF₂)

Magnesium Fluoride (MgF₂), also referred to as Magnesium Difluoride, is a white crystalline alkaline earth metal salt utilized in optical devices. It has high transparency, a low refractive index (n≈1.36), a high threshold to laser-induced damage, high hardness, and excellent stability in hostile environments. In UV light, it fluoresces purple.
Purities Typically Available

92.14% (S= 0.25%, & Ignition loss= 0.44%)
98.0% min. Ca= 0.008% max. (Optical grade)
99.8+% and Ca= 0.1 to 1.0%
99.9% and Ca= 0.1 to 1.0%

Typical Applications

Magnesium Fluoride is utilized in optical devices, including c-Si solar cells as a second−layer antireflection coating. Other optical uses include components in high-power lasers and as an evaporated coating onto aluminum to increase the Vacuum Ultra-Violet (VUV) reflectance and retard oxidation. Other uses include as a Metallurgical (deoxidant) additive, finishing agent for titanium pigment, and fluorescent material for CRT and ceramics.

Packaging Options

Bags, Drums, Super sacks & Loose bulk


Magnesium Fluoride TSCA (SARA Title III) Status: Listed
For further information, please call the EPA Office of Chemical Safety and Pollution Prevention (OCSPP) at 202-564-2902

Magnesium Fluoride (MgF₂) CAS Number: 7783-40-6
Magnesium Fluoride (MgF₂) EINECS Number: 231-995-1

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