Disodium Octaborate Tetrahydrate 20.5% B
- Appearance: White free-flowing powder
- Chemical Formula: Na2B8O13·4H2O
- Water-Soluble Boron (B): > 20.5%
- Equivalent Boric Oxide (B2O3): > 66.0%
- Water Solubility: 100% at recommended dilution
- Water-Insoluble Matter: < 0.1%
- Moisture: < 1.0%
- CAS Number: 12280-03-4
Reference price range:USD 2900 - 3500
Disodium Octaborate Tetrahydrate 20.5% B
Premium agricultural Disodium Octaborate Tetrahydrate 20.5% B: a concentrated, rapidly soluble boron source
Ihumate Disodium Octaborate Tetrahydrate (Na2B8O13·4H2O, CAS 12280-03-4) is a free-flowing white powder with water-soluble boron > 20.5% and an equivalent B2O3 value > 66.0%. It is designed for foliar nutrition, fertigation, hydroponics, and production of boron, multi-micronutrient, water-soluble, liquid and suspension fertilizers.
1. Concentrated precision boron: boron supports cell-wall formation, sugar transport, pollen germination, fruit set and growing-point development when supplied at the correct rate.
2. Rapid dispersion and dissolution: uniform fine powder forms a clear solution at recommended concentrations, supporting spray, drip and professional formulation systems with low residue.
3. Flexible formulation: high elemental-boron concentration reduces the inclusion rate required to reach a target analysis in straight boron, boron-enriched NPK, micronutrient powder and liquid products.
4. The Ihumate advantage: batch control covers water-soluble B, B2O3 equivalent, moisture, insolubles, appearance and dissolution, backed by COA, SDS, export documents, formulation support and OEM/ODM packaging.
Safety note: the margin between boron deficiency and toxicity is narrow. Base use on soil, irrigation-water and tissue analysis, local labels and agronomic advice. Account for sodium contributed by the product in salt-sensitive and soilless systems.
Disodium Octaborate Tetrahydrate 20.5% B Specifications
| Technical Parameters | Detailed Specs | Testing Methods | Reference Standards |
|---|---|---|---|
| Appearance | White free-flowing powder | Visual inspection | - |
| Chemical Formula | Na2B8O13·4H2O | - | - |
| Water-Soluble Boron (B) | > 20.5% | Titrimetric method | - |
| Equivalent Boric Oxide (B2O3) | > 66.0% | Calculated from boron assay | - |
| Water Solubility | 100% at recommended dilution | Visual and gravimetric | - |
| Water-Insoluble Matter | < 0.1% | Gravimetric method | - |
| Moisture | < 1.0% | Oven-drying method | - |
| CAS Number | 12280-03-4 | - | - |
Disodium Octaborate Tetrahydrate 20.5% B - Product and Solubility Video
- White powder with water-soluble boron > 20.5%
- Dissolution and OEM supply presentation
COA, TDS, MSDS & HM Test Reports
Certificate of Analysis (COA)
Certificate of Analysis: Disodium Octaborate Tetrahydrate 20.5% B
Technical Data Sheet (TDS)
TDS: Disodium Octaborate Tetrahydrate 20.5% B
Safety Data Sheet (MSDS)
MSDS: Disodium Octaborate Tetrahydrate 20.5% B
Heavy Metal Test Report
Heavy Metal Test Report: Disodium Octaborate Tetrahydrate 20.5% B
Download Support
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Frequently Asked Questions
1
How does Disodium Octaborate Tetrahydrate differ from borax and boric acid?
It is a concentrated water-soluble borate that generally supplies more elemental B than borax and is well suited to rapidly dissolving foliar and liquid formulations. Boric acid also supplies B, but assay, dissolution behavior and formulation pH differ. Do not substitute equal weights; convert by elemental B and verify compatibility.
2
Where can this boron raw material be used?
Subject to local registration, it suits foliar feeding, fertigation, hydroponics and manufacture of straight boron, multi-micronutrient, water-soluble, liquid and suspension fertilizers. Field use must follow crop, soil, water and tissue diagnosis.
3
How is the application amount calculated from elemental boron?
At 20.5% water-soluble B, product required equals target elemental B divided by 0.205. A target of 0.20 kg B/ha therefore requires about 0.98 kg product/ha before adjustment to the local label and crop safety range.
4
Can it be mixed with fertilizers or pesticides?
It can supply B in multi-nutrient and liquid formulas, but compatibility depends on water, pH, concentration and other ingredients. Dissolve separately and run a jar test. Avoid direct contact with strong acids, strong alkalis, and unverified concentrated calcium or pesticide stock solutions.
5
Do the printed packaging-image specifications apply to this product?
No. The image demonstrates Ihumate bag formats and OEM/ODM design only. Guaranteed analysis, net weight, label and regulatory text follow the contract, batch COA, SDS and destination-market requirements.
6
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We are a professional manufacturing enterprise. Our modern factory is located in Huozhou, Linfen, Shanxi, China. With an annual capacity of 500,000 tons, we invite global partners to visit our facility.
7
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8
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9
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10
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11
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12
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13
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Application & Dosage: Disodium Octaborate Tetrahydrate 20.5% B
For diagnosed boron correction through foliar, fertigation and hydroponic systems and for manufacturing boron, water-soluble, liquid and suspension fertilizers. Calculate every rate as elemental B and adjust from soil, irrigation-water and tissue analysis plus the local label.
Agricultural Application
- Foliar Boron:Use a low, uniform spray before flowering, around bloom or at a diagnosed deficiency stage; avoid heat and intense light and test crop safety first.
- Fertigation and Hydroponics:Dose in splits from target solution B, source-water B and drainage analysis while monitoring root-zone EC and accumulation.
Fertilizer Manufacturing
- Water-Soluble and Liquid Fertilizers:Calculate inclusion from water-soluble B > 20.5% for straight boron, boron-enriched NPK, micronutrient powders and liquids.
- Quality and Compatibility Control:Before production, validate dissolution time, pH, precipitation and storage stability at the target temperature and concentration.
Application Ratio Scheme
| Crop Name | Growth Stage | Application Ratio |
|---|---|---|
| Foliar Spray | Confirmed deficiency, pre-bloom or critical reproductive growth | Typically 0.5-1.5 kg/ha/application; calculate from the local elemental-B recommendation |
| Fertigation/Hydroponics | Nutrient-solution preparation and split correction | Calculate from target B, source-water B and drainage analysis; no universal fixed rate |
| Soil Application | Preplant or in-season correction | Convert only from the locally recommended elemental-B rate and distribute uniformly |
| Fertilizer Production | Boron, WSF, liquid or NPK formulation | Product required = target elemental B ÷ 0.205 |
Product Advantages: Disodium Octaborate Tetrahydrate 20.5% B
Disodium Octaborate Tetrahydrate with water-soluble B > 20.5% provides concentrated, rapidly soluble boron for precision nutrition and professional formulations, backed by Ihumate batch QC and export service.
1
High Water-Soluble Boron
Water-soluble B > 20.5% and B2O3 equivalent > 66.0% reduce the inclusion rate needed for a target elemental-B analysis.
2
Rapid Dissolution and Low Residue
Uniform white powder disperses quickly at recommended concentrations for spray, drip and clear liquid-fertilizer systems.
3
Supports Reproduction and New Growth
Diagnosis-led boron nutrition supports normal cell walls, pollen function, sugar transport, root tips and new shoots.
4
Ihumate Batch and Export Support
Batch COA, impurity and dissolution control, formulation advice, dependable bulk supply and OEM/ODM packaging support professional buyers.
Certifications: Disodium Octaborate Tetrahydrate 20.5% B
Ihumate is backed by globally recognized certifications.
- 🏅 OMRI Listed – Approved for organic use (USDA/NOP standards)
- 🏅 CERES Certified – High-standard organic inputs for sustainable agriculture
- ✔ Excellent international production process with full batch traceability
- ✔ Meeting the strict demands of global distributors and formulators
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Event: Shanghai CAC (Fshow)
Booth: 12G05
Date: March 17-19, 2026
Address: No. 333 Songze Avenue, Qingpu District, Shanghai
Join us at our 2026 exhibitions:
Event: Shanghai CAC (Fshow)
Booth: 12G05
Date: March 17-19, 2026
Address: No. 333 Songze Avenue, Qingpu District, Shanghai
No. 64 Nangou, Chencun, Bailong Town, Huozhou City, Linfen City, Shanxi Province
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