Complete Product Details – Boric Acid (Orthoboric Acid) CAS 10043-35-3

1. Basic Identification Information

2. Physical & Chemical Properties

Appearance

Core Physical Constants

Key Chemical Characteristics

1. Weak monobasic Lewis acid, does not directly dissociate H⁺; combines with water OH⁻ to release hydrogen ions, mild and non-corrosive to most metals at room temperature.
2. Decomposes stepwise under heating:
   • 100–160 ℃: Lose one molecule of water → Metaboric Acid HBO₂
   • Higher temperature → Tetraboric Acid, finally boron trioxide B₂O₃
3. Reacts with strong alkalis to produce borate salts (borax, sodium metaborate); forms borate complexes with polyhydric alcohols (glycerin, mannitol) to strengthen acidity.
4. Broad-spectrum antibacterial, antifungal and antiseptic properties; inhibits mold, yeast and pathogenic bacteria growth.
5. Excellent flame retardant performance; releases water vapor under heating to dilute combustible gas and suppress combustion.
6. Compatible with most inorganic salts and neutral raw materials; no violent reaction under normal conditions; incompatible with strong reducing agents.
7. Reproductive toxicity risk; long-term high-dose intake or repeated skin absorption causes body accumulation hazard.

3. Export Industrial & Food/Pharma Grade Quality Specifications

Premium Industrial Export Grade (Mainstream)

Food / Pharma Grade (USP/FCC Standard)

• Assay ≥99.9%, ultra-low heavy metal & arsenic (As ≤0.3 ppm, Pb ≤1 ppm)
• No toxic heavy metal residues, qualified for ophthalmic buffer, skin ointment and cosmetic raw materials

Electronic High-Purity Grade (≥99.99%)

4. Main Industrial Applications

4.1 Glass & Ceramic Industry (Largest Consumption)

1. Borosilicate heat-resistant glass, optical glass, LCD substrate glass raw material; improves transparency, heat resistance and mechanical strength of glass.
2. Ceramic glaze, enamel raw material: enhances glaze smoothness, reduces melting temperature, prevents glaze cracking and discoloration.
3. Artificial gem, ceramic frit, refractory boron-containing raw material production.

4.2 Agricultural Fertilizer Field

1. Essential trace boron nutrient for crops; promotes flowering, pollen germination and fruit setting, prevents crop boron deficiency diseases (flower and fruit drop, leaf necrosis).
2. Raw material for liquid boron foliar fertilizer, disodium octaborate solid boron fertilizer; compatible with most compound fertilizers.

4.3 Flame Retardant & Wood Preservative

1. Water-based flame retardant for textiles, paper, cotton fabrics, carpets; low-smoke, halogen-free environmental flame retardant.
2. Wood, bamboo, rattan mildew-proof and insect-proof preservative; inhibits mold growth during long-term storage.

4.4 Pharmaceutical, Cosmetic & Daily Chemical

1. Medical antiseptic: ophthalmic washing buffer, skin antifungal ointment, vaginal disinfectant, mild wound cleaning agent.
2. Cosmetic raw material: shampoo, facial cleanser, body lotion pH buffer, mild antibacterial preservative.
3. Raw material for oral care products, skin care exfoliating formulations (only food/pharma grade allowed).

4.5 Fine Chemical & Laboratory Reagent

1. Borate buffer solution for DNA/protein electrophoresis, biochemical lab separation analysis reagent.
2. Raw material for manufacturing borax, sodium metaborate, boric ester organic boron intermediates.
3. Lubricant additive for metal wire drawing, polishing auxiliary agent for metal surface treatment.

4.6 Other Industrial Scenarios

• Electroplating bath pH stabilizer for nickel plating, tin plating;
• Swimming pool mild bactericide and pH regulator;
• Raw material for boron-containing polymer, fire retardant coating;
• Electronic industry wafer cleaning and etching auxiliary agent.

5. Safety, Packaging, Storage & Transportation Regulations

GHS Hazard Classification

• Reproductive Toxicity Category 1B
• Chronic Aquatic Toxicity Category 2
  
  
  Signal Word: Danger
  
  
  Main Hazard Statements:
  
  
  H360FD May damage fertility or the unborn child
  
  
  H412 Harmful to aquatic life with long lasting effects

Export Standard Packaging

1. Industrial crystal grade: 25kg inner plastic liner + outer PP woven bag; 50kg lined iron drum for moisture-sensitive long sea shipment
2. Food/pharma high-purity grade: 25kg food-grade composite aluminum film bag, sealed moisture-proof
3. Small trial packing: 1kg / 5kg sealed plastic can

Storage Requirements

1. Store in cool, dry, well-ventilated general chemical warehouse, ambient temperature ≤30 ℃, tightly sealed to prevent moisture absorption and dust pollution.
2. Separate storage away from food raw materials, feed, strong alkalis and strong reducing agents.
3. Warehouse equipped with dust-proof ventilation, dust masks and protective goggles for operators; avoid long-term dust inhalation.
4. Shelf life: 12 months under dry sealed storage; re-test purity if stored beyond expiry date.

Sea & Land Transportation Rules

• Keep packages waterproof during transit to avoid moisture absorption and bag breakage.
• Forbid mixed loading with edible raw materials, feed and strong alkaline chemicals in one container.
• Complete export clearance documents supplied: COA, MSDS, TDS, marine dangerous goods declaration, REACH registration report.

6. E-commerce Listing Copy (Direct Copy for Echemi / Alibaba)

Product Title

Short Description

Full Listing Description

7. Printable Export Certificate of Analysis Template

CERTIFICATE OF ANALYSIS