What is Calcium Chloride Dihydrate CAS 10035-04-8?

Calcium Chloride Dihydrate CAS 10035-04-8 is the two-water crystalline form of calcium chloride, with molecular formula CaCl2·2H2O and molecular weight about 147.02. It has EINECS number 233-140-8 and is commonly supplied as white flakes or pellets.

How does Calcium Chloride Dihydrate differ from anhydrous calcium chloride?

The dihydrate is CAS 10035-04-8 and contains two water molecules per calcium chloride unit, so its CaCl2 content is lower than the anhydrous form CAS 10043-52-4. Anhydrous calcium chloride is more concentrated and more aggressively hygroscopic, while the dihydrate is easier to handle for many brine, food, and de-icing applications.

Why does the product specification list 74-77% purity instead of 99%?

This table expresses purity as CaCl2 content in the hydrated product. Calcium chloride dihydrate naturally contains water of crystallization, so a high-quality dihydrate typically corresponds to roughly 74-77% CaCl2; some suppliers instead state a dihydrate assay of 99-107% on the hydrated basis. Buyers should compare grade, basis, and intended use together.

What are the main oilfield and de-icing applications?

Oilfield-grade calcium chloride dihydrate is used to increase clear-water brine density and help inhibit reactive clay swelling in drilling fluids. For road maintenance and de-icing, it works at temperatures down to about -25 C and is also used as a dust suppressant because it can retain moisture.

How is Calcium Chloride Dihydrate used in food and construction?

Food-grade material, listed as E509, is used as a firming agent, sequestrant, and calcium source in products such as cheese and canned foods. In construction, it can act as a concrete setting accelerator and early-strength aid, especially in cold-weather concreting.

How should Calcium Chloride Dihydrate be handled and stored?

Keep it in closed, moisture-proof packaging and store in a dry area away from direct water contact. The product is hygroscopic, so prolonged exposure to humid air can cause caking or liquid absorption; the offered PE/PP bags and jumbo bags are intended to limit moisture ingress.

Calcium Chloride Dihydrate CAS 10035-04-8

Calcium Chloride Dihydrate, also called calcium dichloride dihydrate, CAS 10035-04-8, is a water-soluble hygroscopic flake or pellet supplied as food grade E509, technical grade or oilfield grade. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 10035-04-8
Synonyms: Calcium dichloride dihydrate, Calcium chloride 2-hydrate, CaCl2 dihydrate, Calcium(II) chloride dihydrate, Hydrophilite
Einecs: 233-140-8
Molecular Formula: CaCl₂·2H₂O
Grade: Food Grade (FCC), Technical Grade, Oilfield Grade
Package: 25kg PE/PP bags, 1000kg Jumbo bags with moisture-proof liners.

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Product Description

Calcium Chloride Dihydrate CAS 10035-04-8 is the two-water crystalline form of calcium chloride, with molecular formula CaCl2·2H2O, molecular weight about 147.02 and EINECS number 233-140-8.

Synonyms: Calcium dichloride dihydrate; Calcium chloride 2-hydrate; CaCl2 dihydrate; Calcium(II) chloride dihydrate; Hydrophilite.

CAS: 10035-04-8.

It has the molecular formula CaCl2·2H2O and a molecular weight of about 147.02 g/mol.

It is commonly supplied as white flakes or pellets and is very soluble in water.

The product is hygroscopic and contains water of crystallization, so it can absorb moisture from humid air and cake if exposed for a long time.

A typical specification expresses purity as CaCl2 content on the hydrated basis: at least 74.0% for technical grade and 74.0–77.0% for food grade.

Alkalinity as Ca(OH)2 is at most 0.20% technical and 0.15% food, alkali metal chlorides at most 5.0% and 3.0%, water insoluble at most 0.1% and 0.05%, magnesium as MgCl2 at most 0.5% and 0.3%, and iron at most 0.005% and 0.003%.

A 5% aqueous solution has a pH of 8.0–11.0 for technical grade and 7.5–9.0 for food grade.

Food-grade material is additionally controlled for heavy metals as lead at or below 0.001%.

Oilfield-grade material is used to increase clear-water brine density and to provide clay-inhibition properties in drilling fluids.

For road maintenance and de-icing, it works at temperatures down to about -25 °C and is also used as a dust suppressant because it can retain moisture.

Food-grade material, listed as E509, is used as a firming agent, sequestrant and calcium source in products such as cheese, canned foods and brewing.

In construction, it acts as a concrete setting accelerator and early-strength aid, especially in cold-weather concreting.

Confirm appearance, purity basis as CaCl2, alkalinity as Ca(OH)2, alkali metal chlorides, water insoluble, magnesium, iron, pH and heavy metals limits.

Store in a cool, dry, well-ventilated area in closed, moisture-proof packaging; dissolution in water is exothermic, so add the product to water slowly while stirring.

Confirm packaging with the requested quantity and destination requirements.

The page is an RFQ entry point and does not state stock, price, MOQ or fixed lead time.

For an RFQ, state the intended use, required grade and specification, quantity, packaging, destination and document needs.

FAQ - Technical & Supply Chain

Q:
What is Calcium Chloride Dihydrate CAS 10035-04-8?

A: Calcium Chloride Dihydrate CAS 10035-04-8 is the two-water crystalline form of calcium chloride, with molecular formula CaCl2·2H2O and molecular weight about 147.02. It has EINECS number 233-140-8 and is commonly supplied as white flakes or pellets.
Q:
How does Calcium Chloride Dihydrate differ from anhydrous calcium chloride?

A: The dihydrate is CAS 10035-04-8 and contains two water molecules per calcium chloride unit, so its CaCl2 content is lower than the anhydrous form CAS 10043-52-4. Anhydrous calcium chloride is more concentrated and more aggressively hygroscopic, while the dihydrate is easier to handle for many brine, food, and de-icing applications.
Q:
Why does the product specification list 74-77% purity instead of 99%?

A: This table expresses purity as CaCl2 content in the hydrated product. Calcium chloride dihydrate naturally contains water of crystallization, so a high-quality dihydrate typically corresponds to roughly 74-77% CaCl2; some suppliers instead state a dihydrate assay of 99-107% on the hydrated basis. Buyers should compare grade, basis, and intended use together.
Q:
What are the main oilfield and de-icing applications?

A: Oilfield-grade calcium chloride dihydrate is used to increase clear-water brine density and help inhibit reactive clay swelling in drilling fluids. For road maintenance and de-icing, it works at temperatures down to about -25 C and is also used as a dust suppressant because it can retain moisture.
Q:
How is Calcium Chloride Dihydrate used in food and construction?

A: Food-grade material, listed as E509, is used as a firming agent, sequestrant, and calcium source in products such as cheese and canned foods. In construction, it can act as a concrete setting accelerator and early-strength aid, especially in cold-weather concreting.
Q:
How should Calcium Chloride Dihydrate be handled and stored?

A: Keep it in closed, moisture-proof packaging and store in a dry area away from direct water contact. The product is hygroscopic, so prolonged exposure to humid air can cause caking or liquid absorption; the offered PE/PP bags and jumbo bags are intended to limit moisture ingress.

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