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Calcium Acetate

Also known as calcium diacetate, Acetic acid, calcium salt, Lime acetate, PhosLo

Calcium Acetate, also called calcium diacetate, is the calcium salt of acetic acid. Its formula is C4H6CaO4 and its molecular weight is 158.17 g/mol. It is used in chemical, laboratory, food-related, environmental and agricultural contexts, subject to the suitability of the selected commercial grade.

Organic Salts Calcium Carboxylate Salts

Product identity

CAS number
62-54-4
Molecular formula
C4H6CaO4
Molecular weight
158.17 g/mol
Category
Organic Salts
Subcategory
Calcium Carboxylate Salts
Common aliases
calcium diacetate, Acetic acid, calcium salt, Lime acetate

Product overview

What is Calcium Acetate?

Calcium Acetate, also known as calcium diacetate, is the calcium salt of acetic acid. Its CAS number is 62-54-4, its molecular formula is C4H6CaO4, and its stated molecular weight is 158.17. The material combines calcium with acetate groups, giving formulators a convenient source of both an alkaline-earth cation and an organic carboxylate component for appropriately designed chemical systems.

As an ionic organic salt, Calcium Acetate is generally associated with water compatibility and dissociation into calcium and acetate species under suitable conditions. Its behaviour depends on concentration, temperature, solvent composition, pH, and the presence of other ions. Calcium may form sparingly soluble compounds with selected anions, while acetate can participate in acid-base equilibria, so final-system behaviour should be assessed experimentally.

Established industrial and laboratory contexts include chemical synthesis, pH control, analytical work, and selected calcium-containing formulations. It may also appear in process development where acetate chemistry or a soluble calcium source is useful. These broad contexts do not establish suitability for every end use: the appropriate application depends on the required purity profile, formulation environment, process controls, and applicable local requirements.

Selection should begin with the intended reaction or formulation function rather than the name alone. Consider identity, concentration, solvent, competing ions, temperature, moisture exposure, and the consequences of calcium precipitation or acetate exchange. Users should also define their own acceptance criteria for impurities, documentation, handling, and regulatory status. A particular material should be qualified in the actual process before scale-up or routine use. For commercial selection, the compound name should be considered separately from the specification and supplied form required for the intended process.

Technical profile

Product properties

Review the product identity and general physical profile before specifying the grade required for your operation.

IUPAC name
calcium diacetate
Category
Organic Salts
Subcategory
Calcium Carboxylate Salts
Molecular formula
C4H6CaO4
Molecular weight
158.17 g/mol

Uses and markets

Applications and industries

The correct product specification depends on the intended process, grade requirements and operating conditions.

Detailed product information

Detailed Calcium Acetate product information

Composition and Chemical Identity

Calcium Acetate is an organic salt formed from calcium and acetic acid. The material is identified by CAS 62-54-4, molecular formula C4H6CaO4, and molecular weight 158.17. Calcium diacetate is a widely used alternative name, while calcium salt of acetic acid describes its chemical relationship. This identity makes it relevant to formulations requiring coordinated calcium and acetate functionality. Customer specifications should define any additional quality requirements for the intended use.

In aqueous environments, the salt may provide calcium ions and acetate species, although the observed result depends on concentration, temperature, pH, and other dissolved components. Calcium interactions with carbonate, phosphate, sulfate, and other anions can influence clarity, precipitation, or available calcium. Acetate participates in acid-base equilibria and can affect system pH. These considerations are important when developing solutions, reaction mixtures, and buffered processes.

Functional Behaviour in Formulations

The practical value of Calcium Acetate comes from the combination of an inorganic calcium centre with an organic acetate counterion. In a compatible solvent, this arrangement can support calcium delivery, acetate-based buffering, or salt metathesis. Its behaviour is not determined by formula alone; ionic strength, solvent quality, water content, mixing order, and co-formulants can materially change dissolution and final-system performance.

Formulators should examine whether the selected calcium level remains available throughout processing. Competing ligands or precipitation-forming ions may reduce dissolved calcium, while pH changes can alter equilibria and solubility. Bench trials should therefore monitor appearance, pH, temperature response, and stability over the expected process window. A formulation that performs well in water may behave differently in concentrated, mixed-solvent, or multicomponent systems.

Industrial and Laboratory Context

Calcium Acetate can support chemical manufacturing, laboratory investigations, and selected process formulations. In analytical work, it may serve as a calcium-containing reagent or matrix component when the established method calls for acetate chemistry. In manufacturing, it may be selected for a synthesis, adjustment, or formulation step where its ionic composition is compatible. The intended role should be defined by process documentation rather than assumed from general catalogue descriptions.

Research teams may use this compound to study calcium-organic salt interactions, precipitation behaviour, buffer systems, or material compatibility. Educational and development settings can also use it to illustrate ionic compounds and acid-base relationships, subject to appropriate laboratory controls. Industrial users should evaluate downstream residues, equipment compatibility, wastewater implications, and worker procedures before adoption. Local legal and sector requirements remain relevant for every proposed use.

Selection and Process Planning

For Calcium Acetate, a sound selection review considers the complete operating environment: solvent, concentration, temperature, pH, mixing sequence, residence time, and contact with reactive or precipitation-forming materials. Define the required calcium contribution and acetate contribution separately, then confirm that both are acceptable in the final process. If the compound is used as a process input, assess whether residual calcium or acetate could influence later purification, corrosion, crystallisation, or discharge treatment.

Before routine implementation, users should conduct representative trials and establish fit-for-purpose acceptance criteria. Review the supplier documentation available for the selected material, including identity information and any customer-specific quality requirements, without assuming that one grade suits every application. Storage, transfer, dust control, and waste practices should follow the applicable workplace assessment. Qualification should include the real process, realistic concentration ranges, and relevant downstream tests.

Frequently asked questions

Questions about Calcium Acetate

Why does material specification matter when evaluating Calcium Acetate?

Chemical identity confirms that the material is Calcium Acetate, but it does not by itself define purity, physical form, concentration, test methods or suitability for a particular process. Those details belong to the current supplier specification and related documentation. Technical and purchasing teams should compare that information with the intended formulation, operating conditions and internal approval criteria before use. If the supplier, grade, process or end-use requirement changes, the earlier assessment may no longer apply. Keeping identity and specification separate helps prevent similarly named or differently supplied materials from being treated as automatically interchangeable. It also creates a clearer record for receiving, quality review and later change control.

How does Calcium Acetate behave in water-based systems?

In compatible aqueous systems, Calcium Acetate may dissociate to produce calcium and acetate species. The observed behaviour depends on concentration, temperature, pH, ionic strength, and the presence of other chemicals. Calcium can interact with carbonate, phosphate, sulfate, and other anions, potentially creating turbidity or precipitates. Acetate participates in acid-base equilibria and may contribute to buffering within an appropriate pH range, although the compound should not automatically be treated as a universal buffer. Mixing order and local concentration can also affect appearance and stability. Small-scale trials are useful for checking dissolution, pH, clarity, and compatibility before process adoption.

Can Calcium Acetate be used as a calcium source in formulations?

It can be considered as a calcium source when the formulation is compatible with acetate and the required calcium concentration can be achieved. Whether it is suitable depends on the solvent, target pH, concentration, competing ions, processing temperature, and the intended fate of residual acetate. Calcium availability may decrease if insoluble calcium compounds form or if other components bind calcium strongly. A formulation developer should compare the desired function with the effects of the entire salt, not only the calcium portion. Qualification should include representative batches, stability observations, analytical checks, and evaluation of downstream processing or disposal requirements.

What reactions or incompatibilities should users consider?

Users should consider reactions involving both calcium and acetate. Calcium may form low-solubility compounds with selected anions, including carbonate, phosphate, and sulfate, depending on concentration and conditions. Acetate can participate in acid-base reactions and may exchange with other ions during metathesis or processing. Strongly acidic or basic environments can change speciation, while heating or concentration can alter solubility and crystallisation behaviour. Compatibility also depends on ligands, solvent composition, and mixing sequence. A practical assessment should examine the actual formulation, monitor pH and visual changes, and use suitable analytical methods to confirm the intended chemical state.

Where is Calcium Acetate commonly used in industrial or laboratory work?

Common contexts include chemical synthesis, process chemistry, analytical and quality-control work, research and development, and selected pH-control or buffering formulations. It may be chosen when a process needs an organic acetate salt containing calcium, or when calcium and acetate chemistry are both acceptable to the system. These contexts describe established areas of interest rather than a guarantee of suitability for every product or process. The intended application should determine the necessary quality attributes, documentation, and testing. Users should also consider residues, wastewater treatment, equipment compatibility, local requirements, and whether another calcium or acetate source would better meet the process objective.

How should Calcium Acetate selection be evaluated for a new process?

Begin by defining the intended function, required calcium contribution, acetate tolerance, concentration range, solvent, temperature, pH, and contact time. Then examine possible precipitation, complexation, corrosion, crystallisation, and effects on downstream purification. Representative bench trials should test dissolution, appearance, pH, stability, and interaction with every important co-formulant. Acceptance criteria should reflect the actual process rather than a generic catalogue description. Review the documentation for the selected material and establish controls for handling, transfer, storage, and waste. Before scale-up, confirm that the selected material performs consistently within the process window and meets the organisation’s quality and legal requirements.

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