Hubercarb® G3 is a high purity, ultra-fine ground calcium carbonate produced from a high brightness marble deposit in Georgia for applications that require high brightness or pure tints. Carefully controlled particle distribution allows the material to be used in a wide range of applications including paints, coatings, PVC pipe, rubber, plastics, and construction building products.

Functions: Filler

Chemical Family: Calcium Salts, Carbonates, Mica

Particle Size: 3.2 - 3.2 microns

Oil Absorption: 18.0 - 18.0 g/100 g

Technical Data Sheet

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Identification & Functionality

Chemical Name
CASE Ingredients Functions
CAS No.
471-34-1
EC No.
207-439-9
Technologies

Applications & Uses

Properties

Physical Form
Chemical Properties
ValueUnitsTest Method / Conditions
Calcium Carbonate96.0%
Magnesium Carbonate2.5%
Silica and Silicates0.4%
Other1.1%
Physical Properties
ValueUnitsTest Method / Conditions
Acid Solubility (in HCl)95 - 98.5%
Brightness (Hunter reflectance)95.0%
Compacted Bulk Density60lb/ft³ASTM C110
Loose Bulk Density47lb/ft³ASTM C110
Mesh size (+325) (45μm)0.005%
Median Particle Size (Sedigraph®)3.2μ
OIl Absorption18.0lbs oil / 100lbsASTM D281
Hegman Grind6.0
Moisture0.2%ASTM D280
Water Demand57.0ml/100g
Typical Properties
ValueUnitsTest Method / Conditions
Specific Gravity2.7ASTM D153
ColorWhite
pH (Saturated Solution)9.4ASTM D1208
Mineral Properties
ValueUnitsTest Method / Conditions
Hardness (Mohs)3
Linear Expansion Coefficient4.3 x 10^-6°C
Solubility (H₂O, 100°C)0.0035g/100ml
Weight per Gallon (s.g. x 8.345)22.6lbs
Particle Shape (Microscope)Irregular, uniaxial
Refractive Index (Hand. Of Chem. & Phy)1.6
Alkalinity (as NaOH)0.4mg/gmASTM D1208