Drilling / completion brines
Process Role:
Density control and shale inhibition
Critical Procurement / Engineering Parameters:
CaCl₂ assay, brine density, crystallisation temperature, compatibility
TECHNICAL PROCUREMENT INTELLIGENCE
Calcium Chloride (CaCl₂)
Grade, Hydration-State and Brine-Controlled Supply for Oilfield, Water, Construction and Industrial Operations
Calcium chloride is a highly soluble, hygroscopic and often deliquescent inorganic salt supplied as anhydrous pellets, concentrated flakes/granules, hydrated material or aqueous brine. Procurement must specify CaCl₂ assay, hydration state, physical form, impurity limits and end-use requirements because “calcium chloride” is not one interchangeable product.
For GCC and MENA buyers, technical suitability should be confirmed before shipment. OGSCM can coordinate specification review, manufacturer documentation, packaging format, batch traceability, dangerous-goods requirements where applicable, cross-border logistics and receiving-site constraints. Product claims such as food grade, pharmaceutical grade, oilfield grade, REACH/FCC/USP compliance or OEM approval should only be used when documented for the actual offered grade.
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Chemistry, Manufacturing Route & Material Behaviour
Industrial calcium chloride is commonly obtained as a co-product in sodium-carbonate manufacture or by neutralising hydrochloric acid with calcium carbonate/calcium hydroxide, followed by concentration and drying. The earlier statement that it is produced by “reaction of calcium with chlorine” is chemically possible but not representative of mainstream bulk industrial manufacture. Hydration state controls both assay and material behaviour: pure CaCl₂·2H₂O contains about 75.5 wt% CaCl₂ equivalent, while commercial high-assay flakes and anhydrous pellets are more concentrated.
Process-Engineering & Grade-Selection Considerations
- When making brine, add solid calcium chloride slowly to cool water with agitation; dissolution releases substantial heat.
- For oilfield service, define target brine density, crystallisation temperature, divalent-ion compatibility and formation/fluid compatibility, not only dry-product purity.
- Chloride-rich solutions can create severe materials-selection issues; some stainless steels are susceptible to chloride stress-corrosion cracking.
- For reinforced concrete, chloride-bearing accelerators may be restricted by project codes because of reinforcement-corrosion risk.
- For dust control/de-icing, particle form, application method, climate and environmental chloride loading determine field performance.
◎ Technical Specifications
| Property | Value |
|---|---|
Formula |
CaCl₂ |
CAS |
10043-52-4 (anhydrous calcium chloride) |
Molar mass |
110.98 g/mol, anhydrous basis |
Commercial forms |
Anhydrous ≈94–97%; concentrated flakes often ≈83–87%; solutions commonly ≈28–42%, supplier dependent |
Physical behaviour |
Strongly hygroscopic / deliquescent |
Dissolution |
Highly soluble and strongly exothermic in water |
Typical roles |
Brine density, shale inhibition, de-icing, dust control, drying, water chemistry, set acceleration |
Transport |
Many standard solid/liquid grades are not regulated as dangerous goods; confirm the actual SDS |
Example packaged shelf-life |
OxyChem states 36 months for properly stored packaged grades |
Values shown are reference/typical values, not a sales specification. Final acceptance must be based on the offered manufacturer grade, test method, COA and buyer specification.
Applications
De-icing / anti-icing
Process Role:
Freezing-point depression and rapid brine formation
Critical Procurement / Engineering Parameters:
Assay, particle form, application temperature
Dust suppression
Process Role:
Moisture retention on unpaved roads
Critical Procurement / Engineering Parameters:
Assay, dosage, local environmental limits
Industrial drying
Process Role:
Desiccant / gas or liquid dehydration in suitable systems
Critical Procurement / Engineering Parameters:
Anhydrous content, form, regeneration/replacement plan
Water / wastewater
Process Role:
Calcium addition, precipitation/process chemistry
Critical Procurement / Engineering Parameters:
Purity, chloride loading, process target
Concrete / cement
Process Role:
Set acceleration in approved applications
Critical Procurement / Engineering Parameters:
Chloride restrictions, dosage, project specification
Storage, Handling, Materials Compatibility & HSE
Keep packaged solids tightly sealed and protected from humidity; once packaging is compromised, calcium chloride can absorb enough water to cake or liquefy. For liquid storage, select materials using the supplier’s compatibility guidance. OxyChem specifically cautions that common stainless steels may suffer chloride stress cracking in concentrated calcium chloride service and recommends appropriately lined carbon steel or suitable non-metallic systems for certain services.
HSE control principle
Use the current product-specific SDS, local dangerous-goods requirements, receiving-site risk assessment and applicable engineering standards. Website text should never substitute for a supplier SDS or site procedure.
RFQ Specification Checklist
- Required assay (e.g., 77–80%, 83–87%, 94–97% or solution concentration)
- Physical form: flake, pellet, granule, powder or brine
- Application and required standard (oilfield, de-icing, food, concrete, etc.)
- Target brine density / crystallisation temperature if oilfield use
- Impurity and insoluble-matter limits
- Packaging: bags, FIBC, bulk or tanker
- COA, SDS, origin and project compliance documentation
Quality Control, COA Parameters & Test Methods
A technically meaningful RFQ should define the key quality parameters that control calcium chloride performance in the intended application. Typical COA requirements include CaCl₂ assay, magnesium/alkali chlorides, water-insoluble matter, particle size, moisture or hydration state, solution density/specific gravity, and solution pH.
CaCl₂ assay is typically determined by titrimetric or supplier methods and serves as the primary grade discriminator. Mg/alkali chlorides and water-insoluble matter are controlled through supplier or ASTM methods to manage impurities and brine cleanliness. Particle size is commonly assessed by sieve analysis because it affects handling and dissolution rate, while moisture/hydration state influences flowability and active content.
For prepared brines, solution density/specific gravity is used to verify concentration, and pH is checked at a defined concentration to confirm process compatibility. Where applicable, acceptance should also consider relevant standards such as ASTM D98, AASHTO M144, or FCC requirements.
Final COA and test requirements should match the producer specification, customer standard, and intended application.
Why Choose OGSCM?
Application-Driven Solutions
We match the right grade to your process needs.
Reliable Supply Chain
On-time delivery with strong regional & global logistics.
Quality You Can Trust
Strict quality control and batch consistency.
Expert Support
Technical & commercial support throughout your procurement journey.
Regional Presence
Serving industries across GCC and MENA with local expertise.
Frequently Asked Questions
No. Commercial 77% material is usually a hydrated/concentrated form. Anhydrous grades are typically around 94–97% CaCl₂.
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