Physical & Chemical Properties
| Parameter |
Specification |
| Appearance |
White to off-white granules or powder |
| Assay (Ca(NO₃)₂) |
≥ 94.0% |
| Nitrate Nitrogen (N) |
≥ 14.4% |
| Calcium (Ca) |
≥ 24.0% |
| pH (10% solution) |
5.0 – 7.0 |
| Water Insolubles |
≤ 0.1% |
| Melting Point |
561 °C |
| Boiling Point |
Decomposes |
| Relative Density |
2.50 g/cm³ |
| Flash Point |
Non-combustible |
| Solubility in Water |
144 g/100mL (25 °C) |
Applications
- Concrete admixtures — set accelerator for ready-mix and precast concrete, particularly in cold weather.
- Fertilizers — high-purity soluble calcium and nitrate source for fertigation, hydroponics, and greenhouse cultivation.
- Wastewater treatment — hydrogen sulfide (H₂S) and odor control in collection systems, primary treatment, and sludge handling.
- Latex coagulant — used in rubber dipping processes for controlled coagulation.
- Heat transfer fluids — component in molten salt mixtures for thermal energy storage.
Packaging & Storage
- Standard packaging: 25 kg woven polypropylene (PP) bag with inner PE liner; 1000 kg FIBC big bag.
- Custom packaging available upon request (e.g., paper bags, fibre drums).
- Store in a cool, dry, well-ventilated area away from organic materials, reducing agents, and strong acids.
- Keep containers tightly closed when not in use. Avoid moisture uptake to prevent caking.
- Shelf life: 24 months from date of manufacture under recommended storage conditions.
Frequently Asked Questions
Q: What is the primary industrial application of CAS 10124-37-5?
A: The principal use is as a calcium- and nitrogen-based set accelerator in concrete admixtures, especially for cold-weather concreting where early strength gain is critical. A second major application is as a fully water-soluble fertilizer in hydroponics and greenhouse fertigation, providing both calcium and nitrate nitrogen without leaving sulfate residues.
Q: What are the standard packaging options for bulk orders of this chemical?
A: Bulk solid orders of calcium nitrate anhydrous are typically supplied in 25 kg woven polypropylene bags with polyethylene liners, palletized and stretch-wrapped. For high-volume users, 1000 kg FIBC flexible intermediate bulk containers are standard. Custom packaging such as 25 kg paper bags or fiber drums is available on request.
