Hubercarb® M3 is a ultra-fine ground calcium carbonate produced from a uniform, high calcium limestone deposit in Marble Falls, Texas. Carefully controlled particle distribution allows M3 to be used a wide range of applications including paints, coatings, PVC compounds, caulks, silicone rubbers, plastics, and drilling fluids.

Functions: Filler

Chemical Family: Calcium Salts, Carbonates, Quartz

End Uses: Powder Coating, Varnishes

Particle Size: 3.3 - 3.3 microns

Oil Absorption: 17.0 - 17.0 g/100 g

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

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 Carbonate92.0%
Magnesium Carbonate1.5%
Silica and Silicates4.5%
Other2.0%
Physical Properties
ValueUnitsTest Method / Conditions
Acid Solubility (in HCl)92%
Brightness (Hunter reflectance)87.0%
Compacted Bulk Density60lb/ft³ASTM C110
Loose Bulk Density40lb/ft³ASTM C110
Mesh size (+325) (45μm)0.01%
Median Particle Size (Sedigraph®)3.3μ
OIl Absorption17.0lbs oil / 100lbsASTM D281
Hegman Grind6.5ASTM D1210
Moisture0.2%ASTM D280
Water Demand50.0mL/100 gms
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