Decalcifier, Formic Acid is an aqueous, formic acid-based laboratory reagent used to remove calcium salts from fixed mineralized tissue before routine histological processing and sectioning. The formulation contains 10–20% formic acid in water.
Composition: Formic acid, 10–20%; water, 80–90%.
Formic acid is a moderate organic-acid decalcifier that provides a practical balance between the rapid action of strong mineral acids and the slower calcium removal associated with chelating agents such as EDTA. Decalcification time depends on specimen type, thickness, mineral density, fixation, solution volume, and processing conditions.
This reagent may be used in research histology workflows involving fixed bone, teeth, and other calcified or mineralized tissue specimens. Laboratories should establish a validated protocol for endpoint determination and downstream staining or molecular analysis.
Key Properties
- Aqueous formic acid decalcifying solution
- Contains 10–20% formic acid and 80–90% water
- Colorless liquid formulation
- Moderate organic-acid decalcifier
- Product number 25839; formic acid CAS number 64-18-6
- Stored at room temperature
Applications
Bone & Mineralized Tissue Decalcification
Used to remove calcium salts from fixed bone and other mineralized tissue before routine laboratory processing and sectioning.
Dental & Calcified Specimen Preparation
May be used for fixed teeth and other calcified specimens that require softening before trimming, embedding, or microtome sectioning.
Routine Histology Processing
Decalcified specimens may be processed using an appropriate laboratory schedule after the endpoint has been confirmed and residual acid has been removed.
Research Specimen Preparation
Suitable for research workflows in which mineralized tissue must be prepared for morphological evaluation or other validated downstream procedures.
Compatibility & Decalcification Considerations
- Fully fix tissue before beginning acid decalcification
- Completely immerse the specimen using an adequate volume of solution
- Monitor the endpoint carefully to prevent incomplete or excessive decalcification
- Validate exposure time when downstream immunohistochemical or molecular analysis is planned
Incomplete decalcification can make specimens difficult to section, while prolonged acid exposure may adversely affect tissue morphology, staining quality, antigenicity, or nucleic-acid performance.
Application Tips
- Trim fixed specimens to a practical thickness before treatment when appropriate
- Use a clean, compatible container and fully cover the specimen with solution
- Check progress at intervals established by the laboratory’s validated protocol
- Rinse the specimen thoroughly after decalcification and before routine processing
Handling & Storage
- Store at room temperature in a cool, well-ventilated location
- Keep the product secured and the container closed when not in use
- Use with good ventilation and avoid breathing mist or vapor
- Wear protective gloves, protective clothing, and eye or face protection
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FAQ
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1. What is Decalcifier, Formic Acid used for?
It is used to remove calcium salts from fixed bone, teeth, and other mineralized or calcified tissue specimens before routine histological processing and sectioning.
2. What is the composition of this decalcifier?
The product is an aqueous mixture containing 10–20% formic acid and 80–90% water.
3. Must tissue be fixed before decalcification?
Yes. Mineralized tissue should be thoroughly fixed before acid decalcification to help preserve tissue structure during processing.
4. How is the decalcification endpoint determined?
The endpoint should be determined using a laboratory-validated method appropriate for the specimen. Options may include radiographic assessment, an applicable chemical calcium test, or careful evaluation of specimen flexibility and sectionability.
5. Can formic acid decalcification affect downstream testing?
Yes. Prolonged exposure may affect staining, antigenicity, and nucleic-acid quality. Exposure time and downstream compatibility should be validated for each specimen type and analytical method.
Safety & Documentation
This product is a corrosive mixture that causes severe skin burns and serious eye damage. Use with good ventilation and appropriate personal protective equipment, including protective gloves, clothing, and eye or face protection. Avoid breathing mist or vapor. Refer to the product Safety Data Sheet (SDS) for complete handling, first-aid, storage, spill, disposal, and regulatory guidance.
