Calcium Hydroxide

Product Code : SCL-LC-12294

Calcium Hydroxide (SKU SCL-LC-12294), also known as slaked lime or hydrated lime, is an alkaline reagent that school and college chemistry labs use mainly to make limewater, the classic test for carbon dioxide. It also serves lessons on bases, neutralisation and calcium compounds. Supplied from Ambala, India by Science Lab Supplies, it reaches schools, colleges, training institutes, tender contractors and distributors.

Specifications

The compound has the formula Ca(OH)2, CAS number 1305-62-0 and a molecular weight of about 74.1 g/mol. It dissolves only slightly in water, which is why a filtered, saturated solution is used as limewater. Its dust irritates the eyes, skin and airways. Grade, assay, form and pack size appear on the label and quotation.

Applications and Experiments for Calcium Hydroxide

Its main job is limewater: when carbon dioxide bubbles through the clear solution, insoluble calcium carbonate forms and the liquid turns milky. The same reagent is used to show that a base neutralises an acid and to introduce the chemistry of calcium and other alkaline earth compounds.

• Class 10 science: testing the gas from acids and carbonates with limewater.
• Biology practicals: showing that exhaled air contains more carbon dioxide.
• Class 11 chemistry: properties of calcium compounds in the s-block elements unit.
• Qualitative inorganic analysis involving calcium compounds.

Standard Scope of Supply

The order is one pack of calcium hydroxide in the quantity quoted, with a label giving batch and hazard details, the Safety Data Sheet and the 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

A quotation can cover one pack for a single lab or bulk packs for many schools, and it states the packing, delivery time and price for exactly what you request. Glassware for limewater tests and other school chemistry lab equipment in India can be added to it.

As a registered exporter with an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Malaysia, Peru, Egypt, Iraq, Nigeria and Kenya. Start an enquiry on the contact page, build a list in the enquiry cart, or read the lab tender page for tender purchases.

Frequently Asked Questions

How is limewater made from calcium hydroxide?
Stir a small amount into water, let the undissolved solid settle and filter off the clear, saturated solution. Keep it stoppered, because carbon dioxide from the air slowly turns it milky.

Is calcium hydroxide the same as slaked lime?
Yes. Slaked lime, hydrated lime, calcium hydrate and caustic lime are all names for Ca(OH)2. Check the label for the grade before using it in a practical.

Is calcium hydroxide hazardous?
Yes, it needs care. The alkaline dust can irritate or damage the eyes, skin and respiratory tract, so use eye protection, gloves and dust control, and let trained staff supervise weighing and mixing.

Who supplies the Calcium Hydroxide?
Science Lab Supplies sends it from its base in Ambala, India to schools, colleges and distributors, and confirms the grade and pack size in each quotation.

Related Bases and Calcium Compounds

Calcium hydroxide sits between the strong laboratory alkalis and the other calcium and alkaline earth compounds in a chemistry syllabus. These four reagents from the Lab Chemicals range let teachers compare bases and calcium salts side by side, and they fit on the same quotation.

• Barium Hydroxide — another alkaline earth hydroxide for base and titration work.
• Sodium Hydroxide Flakes — strong, corrosive alkali for titration and neutralisation.
• Calcium Sulphate Anhydrous — calcium salt for lessons on hydrated and anhydrous compounds.
• Magnesium Oxide Light — powdered oxide for inorganic oxide chemistry.

Browse the full Lab Chemicals range or all school lab equipment.

Last updated: 25 September 2026