Hubercarb® Q325

Identification & Functionality

Chemical Family

Calcium Salts,

Carbonates,

Kaolins

Chemical Name

Calcium Carbonate

CASE Ingredients Functions

Filler

CAS No.

471-34-1

EC No.

207-439-9

Technologies

CASE Ingredients

Product Families

CASE Ingredients — Additives

Fillers & Extenders

Applications & Uses

Markets

Adhesives & Sealants,

Building & Construction

Applications

Adhesives & Sealants — Building & Construction

Sealants & Caulks

Building & Construction — Building Materials

Sealants & Caulks

Compatible Polymers & Resins

Cement,

Polyolefins,

Silicones

Properties

Physical Form

Powder,

Solid

Chemical Properties

	Value	Units	Test Method / Conditions
Calcium Carbonate	96.5	%	-
Magnesium Carbonate	2.0	%	-
Silica and Silicates	1.0	%	-
Other	0.5	%	-

Physical Properties

	Value	Units	Test Method / Conditions
Acid Solubility (in HCl)	98.5 - 99	%	-
Brightness (Hunter reflectance)	86.0	%	-
Compacted Bulk Density	80	lb/ft³	ASTM C110
Loose Bulk Density	50	lb/ft³	ASTM C110
Mesh size (-325) (45μm)	99.5	%	-
Median Particle Size (Cilas®)	13.0	μ	-
OIl Absorption	14.0	lbs oil / 100lbs	ASTM D281
Moisture	0.1	%	ASTM D280
Water Demand	40.0	mL/100 gms	-

Typical Properties

	Value	Units	Test Method / Conditions
Specific Gravity	2.7	-	ASTM D153
Color	White	-	-
pH (Saturated Solution)	9.4	-	ASTM D1208

Mineral Properties

	Value	Units	Test Method / Conditions
Hardness (Mohs)	3	-	-
Linear Expansion Coefficient	4.3 x 10^-6	°C	-
Solubility (H₂O, 100°C)	0.0035	g/100ml	-
Weight per Gallon (s.g. x 8.345)	22.6	lbs	-
Particle Shape (Microscope)	Irregular, uniaxial	-	-
Refractive Index (Hand. Of Chem. & Phy)	1.6	-	-
Alkalinity (as NaOH)	0.4	mg/gm	ASTM D1208