Ammonium pentaborate octahydrate
Ammonium pentaborate octahydrate (CAS: 12046-03-6) is a white crystalline solid with the linear formula (NH4)2B10O16 · 8H2O and a molecular weight of 544.30 g/mol. This inorganic salt is a source of boron and finds utility in materials science, metal and ceramic applications, and as a research essential. Its properties make it valuable in various industrial and laboratory contexts requiring boron compounds.

Materials Science
Serves as a precursor or component in the development of advanced materials, leveraging its boron content for specific properties.
Metal and Ceramic Science
Utilised in processes related to metals and ceramics, potentially in surface treatments, coatings, or as a fluxing agent.
Chemical Synthesis
Acts as a boron-containing reagent in various chemical syntheses and research applications within laboratories.
Analytical Reagent
Can be employed in specific analytical methods requiring a controlled source of borate ions.
| Molecular weight | 544.30 |
|---|---|
| Linear formula | (NH4)2B10O16 · 8H2O |
| Assay | ≥99% |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Ammonium pentaborate octahydrate used for?
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Ammonium pentaborate octahydrate is used in materials science, metal and ceramic science, as a research essential, and in chemical synthesis.
What are the CAS number and formula for Ammonium pentaborate octahydrate?
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The CAS number is 12046-03-6, and the linear formula is (NH4)2B10O16 · 8H2O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Ammonium pentaborate octahydrate with an assay of ≥99%. We do not represent this product as USP, BP, or EP grade.
How should Ammonium pentaborate octahydrate be handled safely?
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Handle with appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, and gloves. Avoid dust formation and ensure adequate ventilation. It is a Warning substance that can cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335).
Is this chemical suitable for export?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals.
How can I request a sample or quote?
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Please contact our sales team via the website or direct contact details to request a sample or a quotation for Ammonium pentaborate octahydrate.
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