CALCIUM SULFATE INFORMATION
Calcium Sulfate has three major forms: Dihydrate (Terra Alba), hemi-hydrate (Gypsum Plaster or Stucco), and anhydrous (Anhydrite).
USES FOR CALCIUM SULFATE
Calcium Sulfate is widely used in the food and pharmaceutical industries for various reasons.

GRADES OF CALCIUM SULFATE
SULFATE AGRICULTURAL INFORMATION
A high purity, natural source of calcium sulfate used to promote plant growth in crops, lawns, gardens and other agricultural applications.
TYPICAL CHEMICAL ANALYSIS: | |
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Calcium Sulfate Dihydrate Equivalent (CaSO4- 2H20) | 92% |
Calcium Sulfate Equivalent (CaSO4) | 73% |
Calcium (Ca) | 21% |
Sulfur (S) | 17% |
pH | 7.0 |
BULK DENSITY: |
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72 lbs. / ft3 loose |
~94 lbs. / ft3 packed |
APPROXIMATE SIZING: | |
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% Passing – 4 Mesh | 100.00% |
% Passing – 8 Mesh | 100.00% |
% Passing – 16 Mesh | 100.00% |
% Passing – 30 Mesh | 99.99% |
% Passing – 40 Mesh | 99.99% |
% Passing – 50 Mesh | 99.99% |
% Passing – 100 Mesh | 99.99% |
% Passing – 200 Mesh | 99.88% |
% Passing – 3250 Mesh | 97.97% |
Sulfate Anhydrous Food Grade (China) INFORMATION
This is a very pure (98 – 99%) white gypsum for use in food products that meet NF requirements for calcium sulfate. It is made from a natural calcium sulfate deposit. The material is often used a coagulant in tofu making, a processing aid in baking and as a calcium supplement and bedding medium in pharmaceutical manufacturing.
Chemical Analysis | |
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Total Calcium | 29.2% |
CaO | 41.0% |
SO3 | 57.5% |
CaSO4 . 2H2O | — |
250°C water loss | 0.8% |
Physical Properties | |
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Specific Gravity | 2.95 |
Loose bulk density | 44.0 |
Compacted bulk density | 65.0 |
Solubility (70°F) g / 100cc of H2O | 0.26 |
pH (10% slurry) | 10.5 |
Brightness | 97 |
SULFATE ANHYDROUS SNOW WHITE FILLER USP INFORMATION
Very white CaSO4 for use in the food and pharmaceutical industries. This item is terra alba (CaSO4-2 H2O) calcined to irreversibly remove the crystalline water creating CaSO4. It has more calcium per unit weight than terra alba. Certified to meet all USP Standards.
Chemical Properties | |
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Loss on ignition | 0.33% |
CaSO4 assay | 99.0 % guaranteed |
Oxides | 0.31% |
Silica & Insolubles | 0.13% |
Iron | 100. ppm max |
Heavy Metals | 10. ppm max |
pH in 10% slurry | 10.4 |
Physical Properties | |
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Brightness | 93.1 |
Specific Gravity | 2.96 |
Bulk Density Loose | 45.5 lb/ft3 |
Bulk Density Packed | 52.2 lb/ft3 |
Bulking | .0406 gal/lb |
Oil Absorption | 26.5 cc/100 gr |
Through 325 mesh | 97.% |
Average Particle Size | 7. micron |
SULFATE COARSE GRANULATED ACG TERRA ALBA INFORMATION
This product has an extra course grain size. It is used in special manufacturing situations where its large particles are required
Chemical Analysis | |
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CaSO4 | 99.0% |
Insolubles | .45% |
Iron | 100. ppm max. |
Heavy Metals as Pb | 2. ppm max. |
PHYSICAL PROPERTIES | ||
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Typical Particles Size | +4 | 0+/- 1 |
US stand mesh | 4-12 | 65+/-10 |
12-30 | 35+/- 10 | |
-30 | 5+/- 5 | |
Guaranteed Size | +4 | 1%retained Max |
-30 | 10%passing Max | |
Specific Gravity | 2.32 | |
pH(10%) | 7.5 | |
Color | White |
Sulfate Dihydrate Food Grade China INFORMATION
This is a high-quality and highly pure (98 – 99%) white gypsum for use in food products that meet NF requirements for calcium sulfate dihydrate CaSO4 – 2(H2O). It is made from a natural calcium sulfate deposit and is ground to a fine powder containing about 20% moisture.
The material meets the standards of the Food Chemicals Codex and National Standard GB1886.6-2016.
Chemical Analysis | |
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Total Calcium | 23.0% |
CaO | 32.1% |
SO3 | 46.0% |
CaSO4 | 99.0% |
250°C water loss | 20.30% |
Physical Properties | |
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Specific Gravity | 2.30 |
Loose bulk density | 55.0 |
Compacted bulk density | 70.0 |
Solubility (70°F) g / 100cc of H2O | 0.26 |
pH (10% slurry) | 7.2 |
Brightness | 96 |
SULFATE DOMESTIC TERRA ALBA USP INFORMATION
This is a white Gypsum conforming to USP, NF, and the Food Chemical Codex. Excellent for applications in the pharmaceutical and food industries.
Chemical Properties | |
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Loss on Ignition | 20.3% |
CaSO4 Assay | 99.0% guarantee |
Silica & Insolubles | .45% |
Oxides | .35% |
Iron | 100. ppm max. |
Heavy Metals | 10. ppm max. |
PH in 10% slurry | 7.3 |
Bulk Density | |
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Loose | 46.0 lb/ft3 |
Packed | 56.2 lb/ft3 |
Physical Properties | |
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Brightness | 84.4 |
Specific Density | 2.32 |
Bulking | .0518 gal/lb |
Oil Absorption | 23.5 cc/100 gr |
Through 325 mesh | 93% |
Average Particle Size | 14. micron |
SULFATE FEED GRADE GYPSUM INFORMATION
This is a feed purity calcium sulfate suitable for enriching pet food.
Chemical Composition | |
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CaSO4 2H2O | 91 – 92 |
MgCO3 | 1 – 2% |
CaCO3 | Less than 1% |
Fe2O3 | Less than .05% |
Al2O3 | Less than 0.2% |
Physical Properties | |
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Bound Water | 19.12% |
Hardness (Mohs) | 2 |
Specific Gravity | 2.32 |
pH | 7.8 |
Moisture | Less than .1% |
Average Bulk Density lb/ft3 | 50 – 55 |
Average Particle Size, Microns Proprietary | |
% Retained – 100 mesh | Trace |
% Retained – 200 mesh | 5 – 8 |
% Retained – 325 mesh | 32 – 35 |
SULFATE FOOD AND PHARMACEUTICAL GRADE USP AND FCC INFORMATION
This is a high purity calcium sulfate dihydrate milled in the USA from the very purest and whitest gypsum. It will meet or exceed all FCC and USP specifications and is suitable for all types of food and pharmaceutical formulations.
Chemical Analysis | |
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CaSO4 – 2(H2O) | 99.1% |
Loss on Drying | 18.7% |
As | less than 0.1 ppm |
Fl | 11 ppm |
Heavy Metals | less than 10. ppm |
Se | less than 0.5 ppm |
Physical Analysis | |
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Appearance | Powder |
Color | Bright White |
Plus 100 mesh | trace |
thru 325 mesh | 96.5% |
SULFATE GRANULAR 16-100 INFORMATION
This is an industrial gypsum carefully screened to be free of both fine and oversized material.
Chemical Analysis | |
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CaSO4 | 98.0% |
Combined Water | 19% |
MgCO3 | 0.4 |
Fe2O3 | 0.03 |
SiO2 | 0.15 |
Insoluble | 2.20 |
Physical Analysis | |
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Specific Gravity | 2.32 |
Hardness, Mohs | 2.00 |
pH | 7.5 |
Moisture | 0.05% |
+10 Mesh | 0-Trace |
10/20 | 0-3% |
20/100 | 70-80% |
-100 | 20-30% |
Physical Properties | |
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Particle Size | 30-80 mesh 94% |
Specific Gravity | 2.32 gr/ml |
Apparent Density | .94 gr/ml |
pH (10%) | 7.3 |
Color | White |
SULFATE GRANULATED COARSE 4/20 INFORMATION
This product has an extra coarse grain size. It is used in special manufacturing situations where its large particles are required.
Chemical Analysis | |
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CaSO4 | 99.0% |
Insolubles | .45% |
Iron | 100. ppm max |
Heavy Metals | 10. ppm max |
Physical Properties | |
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Typical Particle Size | +4 0 +/- 1 |
US stand mesh | 4-12 65 +/-10 |
12-30 35 +/- 10 | |
-30 5 +/- 5 | |
Guaranteed Size | +4 1% retained Max |
-30 10% passing Max | |
Specific Gravity | 2.32 |
pH (10%) | 7.3 |
Color | White |
SULFATE GRANULATED TERRA ALBA USP INFORMATION
This free flowing product is especially designed for high speed, direct compression tablet manufacturing. The material meets or exceeds all the USP, NF, and F& C codex requirements.
Chemical Analysis | |
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CaSO4 | 99.0%. |
Insolubles | .45% |
Iron | 100. ppm max |
Heavy Metals | 10. ppm max |
Physical Properties | |
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Particle Size | 30-80 mesh 94% |
Specific Density | 2.32 gr/ml |
Apparent Density | .94 gr/ml |
pH (10%) | White |
SULFATE INDUSTRIAL GYPSUM 1.0 INFORMATION
This Calcium Sulfate is specifically designed for specialty cement applications. It is a mix of anhydrous (approximately 75%) and dihydrate (~25%) calcium sulfates. The product allows for regulated set-times and dimensional stability.
Chemical Analysis | |
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CaSO4 | 67 – 70% |
CaSO4 +2H2O | 22 – 25% |
CaCO3 + MgCO3 | 2.4% |
Combined moisture | 5.3% max |
PHYSICAL PROPERTIES | |
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Loosebulk density lb / ft3 | 78 |
Packedbulk density lb / ft3 | 98 |
MohsHardness | 2 |
Specificgravity | 2.3 |
Medianparticle size (microns) | 21 |
Passing through | % (by weight) |
30 mesh | 100.0 |
50 mesh | 99.8 – 100.0 |
100 mesh | 88.0 – 100.0 |
200 mesh | 74.1 – 100.0 |
325 mesh | 57.8 – 100.0 |
SULFATE NATURAL ANHYDRITE INFORMATION
White CaSO4 for use in the industrial markets. This item is the naturally occurring anhydrite ore pulverized for manufacturing the crystalline water creating CaSO4. It has more calcium and more sulfur per unit weight due to its lack of crystalline water.
Chemical Analysis WT%, Dry Basis | |
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Silicon Dioxide, SiO2 | 0.70% |
Aluminum Oxide, Al2O3 | 0.03% |
Iron Oxide, Fe2O3 | less than 0.01% |
Total (SiO2, Al2O3, Fe2O3) | 0.73% |
Calcium Oxide, CaO | 38.24% |
Magnesium Oxide, MgO | 0.65% |
Sodium Oxide, Na2O | 0.01% |
Potassium Oxide, K2O | 0.01% |
Titanium Dioxide, TiO2 | 0.01% |
Manganese Dioxide, MnO2 | less than 0.01% |
Phosphorus Pentoxide, P2O5 | 0.01% |
Strontium Oxide, SrO | 0.08% |
Barium Oxide, BaO | 0.01% |
Sulfur Trioxide, SO3 | 58.97% |
Combined Water | 0.42% |
Loss on Ignition, @1000 C | 0.86% |
Total | 100.00% |
Free Moisture, as Received | 0.02% |
Particle Size | |
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Through 200 mesh | 99.5% Min |
GRANULATED ACG TERRA ALBA USP INFORMATION
This free flowing product is especially designed for high speed, direct compression tablet manufacturing. The material meets or exceeds all the USP, NF, and F&C codex requirements for calcium sulfate dihydrate CaSO4-2(H2O).
Chemical Analysis | |
---|---|
CaSO4 Assay | 99.0% 98% min |
Insolubles | .45% |
Iron | 100. ppm max. |
Heavy Metals as Pb | 2. ppm max. |
PHYSICAL PROPERTIES | |
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Particles Size | 30-80mesh 94% |
Specific Density | 2.32gr/ml |
Apparent Density | .94gr/ml |
pH(10%) | 7.5 |
Color | White |
SULFATE TERRA ALBA 1.0 INFORMATION
This Calcium Sulfate is made by grinding and air separating high purity white gypsum that contains about 20% moisture. Depending upon pressure, humidity, loading, etc., this moisture (often called “combined water”) begins to be released when heated above 50 °C. At 180 °C, about three-fourths of the combined water is released. Water is not totally removed until temperatures exceed 400 °C.
Chemical Properties | |
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Loss on Ignition | ~ 20.0% |
CaSO4 + H2O | 98.0% |
pH – 10% slurry | .7.3 |
Free moisture at 45 °C | 0.1 |
Combined moisture | 19.0 |
Physical Properties | |
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Loose bulk density lb / ft3 | 42 |
Packed bulk density lb / ft3 | 62 |
Mohs Hardness | 2 – 3 |
Specific gravity | 2.3 |
Median particle size (microns) | 13.0 |
Maximum particle size (microns) | 150 |
Passing 325 mesh | 93% |
Hunter color values: | |
L: | 88.0 |
a: | 0.8 |
b: | 4.3 |
GRANULATED CALCIUM SULFATE FEED GRADE INFORMATION
Calcium Sulfate Feed Grade Course is a high purity natural gypsum.
Chemical Analysis | |
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CalciumSulfate Dihydrate Equivalent (Gypsum, CaS04 & 2H2O) | 81% |
CalciiumSulfate Equivalent (CaCO4) | 64% |
Calcium(Ca) | 19% |
Sulfur(S) | 15% |
pH | 7.3% |
PHYSICAL PROPERTIES | |
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Particles Size | 30-80mesh 94% |
Specific Density | 2.32gr/ml |
Apparent Density | .94gr/ml |
pH(10%) | 7.3 |
Color | Off White |
SULFATE WHITE MOLDING PLASTER INFORMATION
This is a high purity general purpose plaster that can be used in a wide variety of applications. The physical properties can be varies depending upon the desired end use.
Typical Properties | |
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Normal Consistency | 74 lbs. water/100 lbs. product (34kg water/45 kg product) |
Hand Mix VicatSet, Range | 25 – 50 minutes |
Compressive Strength, One Hour After Set | 850 – 1250 psi (5.9 – 8.6 MPa) Compressive |
Strength, Dry | 1700 – 2500 psi (11.7 – 17.2 MPa) |
pH Reaction | Alkaline |
% Expansion | .15% – 0.20% |
% Passing – 50 mesh | 99% – 100% |
% Passing – 200 mesh | 98.5% – 100% |