Calcium Sulphate Anhydrous
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Product Code : SCL-LC-12267
Calcium Sulphate Anhydrous (SKU SCL-LC-12267) is the water-free form of calcium sulphate, CaSO4, used in supervised chemistry practicals on sulphate salts, hydrates and drying behaviour, and for controlled reagent preparation. Schools, colleges and science departments use it when teaching how gypsum, Plaster of Paris and the anhydrous salt differ. It reaches schools, colleges, training institutes, tender contractors and distributors through Science Lab Supplies in Ambala, India.
Specifications
Anhydrous calcium sulphate has the formula CaSO4 and CAS number 7778-18-9. It is distinct from gypsum, the dihydrate, and from Plaster of Paris, the hemihydrate. Grade, assay, particle form and pack size are stated on the batch label and the quotation, and the salt should be kept away from moisture.
| Parameter | Value |
|---|---|
| SKU | SCL-LC-12267 |
| Formula | CaSO4 (anhydrous) |
| CAS number | 7778-18-9 |
| Chemical type | Inorganic sulphate salt |
| Not to be confused with | Gypsum (dihydrate), Plaster of Paris (hemihydrate) |
| Grade and pack size | As stated on the label and quotation |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for Calcium Sulphate Anhydrous
The anhydrous salt is a clear teaching example of water of crystallisation: set beside gypsum and Plaster of Paris, it shows how the same compound changes with its water content. Because it takes up moisture, it also suits supervised drying-agent demonstrations and general sulphate-salt lessons.
- Class 10 science: acids, bases and salts, comparing gypsum, Plaster of Paris and anhydrous calcium sulphate.
- Class 11–12 chemistry: calcium compounds and hydrated versus anhydrous salts.
- Drying-agent and moisture demonstrations where the SOP allows it.
- Recording observations on sulphate salts in practical files.
Standard Scope of Supply
One pack of anhydrous calcium sulphate is supplied per unit, in the quantity shown on the quotation, labelled with batch, hydration state and hazard details and sent with its Safety Data Sheet and transport documents. Shelf life depends on the chemical, its grade and storage conditions; ask us for the expiry date of the batch you are quoted.
Packing, MOQ and Lead Time
From a single pack for one school to a stock for many labs, any quantity can be quoted, and the quotation gives packing, delivery time and price for it. Packing keeps the salt sealed against moisture, and other school chemistry lab equipment in India can go on the same quotation.
As a registered exporter with an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Rwanda, South Africa, Qatar, Sri Lanka, Vietnam and Malaysia. Start an enquiry from the contact page or the enquiry cart; for tender purchases, the lab tender page has the details.
Frequently Asked Questions
Is calcium sulphate anhydrous the same as gypsum?
No. Gypsum is calcium sulphate dihydrate and Plaster of Paris is the hemihydrate, while this product is the water-free form, CaSO4. The label confirms the hydration state of each batch.
Is it safe for school chemistry labs?
Yes, in supervised school and college labs. Avoid breathing the dust and getting it in the eyes, keep it in labelled containers and do not mix it with unknown chemicals.
Who supplies the Calcium Sulphate Anhydrous?
It is supplied by Science Lab Supplies from Ambala, India, a laboratory chemicals supplier in India that states grade and pack size on every school, college or distributor quotation.
How should it be stored?
Keep the pack tightly closed in a cool, dry, ventilated chemical store and away from moisture, so the salt stays anhydrous for experiments that need it.
Related Calcium and Sulphate Salts
Lessons on salts, hydrates and drying agents draw on a few related compounds. These four chemicals from the same range extend the calcium sulphate practical to other calcium salts, sulphates and hydrated crystals, and can be ordered on the same quotation for a school or college chemistry store.
- Calcium Chloride Fused (CaCl2) — hygroscopic calcium salt for drying and desiccation.
- Calcium Hydroxide — alkaline reagent for limewater and carbon dioxide tests.
- Sodium Sulphate — sodium salt for sulphate salt studies.
- Copper Sulphate Blue Crystal — copper(II) sulphate for crystallisation and hydration experiments.
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Last updated: 25 September 2026
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