Hubercarb® Q325

1 of 51 products in this brand
Hubercarb® Q325 is a medium fine ground calcium carbonate produced at Huber’s Quincy, Illinois plant which is known for its natural uniformity producing consistent purity and brightness. Carefully controlled particle distribution allows Q325 to be used a wide range of applications including paints, coatings, adhesives, caulks, and concrete building products. Acid solubility above 95% makes Q325 ideal for use in oilfield drilling fluids.

Functions: Filler

Chemical Family: Calcium Salts, Carbonates, Kaolins

Compatible Polymers & Resins: Cement, Polyolefins, Silicones

Particle Size: 13.0 - 13.0 microns

Oil Absorption: 14.0 - 14.0 g/100 g

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Identification & Functionality

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

Applications & Uses

Compatible Polymers & Resins

Properties

Physical Form
Chemical Properties
ValueUnitsTest Method / Conditions
Calcium Carbonate96.5%
Magnesium Carbonate2.0%
Silica and Silicates1.0%
Other0.5%
Physical Properties
ValueUnitsTest Method / Conditions
Acid Solubility (in HCl)98.5 - 99%
Brightness (Hunter reflectance)86.0%
Compacted Bulk Density80lb/ft³ASTM C110
Loose Bulk Density50lb/ft³ASTM C110
Mesh size (-325) (45μm)99.5%
Median Particle Size (Cilas®)13.0μ
OIl Absorption14.0lbs oil / 100lbsASTM D281
Moisture0.1%ASTM D280
Water Demand40.0mL/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