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Natural Pigments Fumed Silica

SKU: NAP-510-18FSIL01
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Description
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Fumed silica (also called pyrogenic silica)

A hydrophilic silica with a specific surface of 200 square meters per gram. Fumed silica has a chain-like particle structure that bonds together to trap liquid, thereby increasing the viscosity. Add to thicken and increase the transparency of paint. Stirring or brushing paint containing fumed silica will cause it to flow, but when stopped, the paint will 'thicken up' again. This property is called ‘thixotropy’.

Properties
Average Primary Particle Size: 12 nm
Specific Surface Area (BET): 200 m2/g
Bulk Density, Loose: 30 g/L
Bulk Density, Packed: 50 g/L
Oil Absorption (Gardner-Coleman): 138 g oil per 100 g pigment
pH Value (4% solution): 3.7–4.7
Color: White
Refractive Index: 1.48–1.50
Moisture Content (maximum) (ASTM C 323-56 or C 234-82): 1.5%
Loss on Ignition (ASTM C 323-56): 1.0%
Chemical Analysis
Silicon Dioxide (SiO2): 99.8%
Health and Safety

WARNING: The product contains crystalline silica - quartz, which can cause silicosis (an occupational lung disease) and lung cancer.



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This product is shipped from our warehouse in Willits, CA, USA.
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This product is brand new and includes the manufacturer's warranty, so you can buy with confidence.
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