Triethyl Borate (Triethoxyborane) CAS 150-46-9 Full English Export Specification

1. Basic Identification

• IUPAC Name: Triethoxyborane
• Common Names: Triethyl borate, Boric acid triethyl ester, TEOB
• CAS No.: 150-46-9
• EC/EINECS No.: 205-760-9
• MDL No.: MFCD00009064
• Molecular Formula: \(\boldsymbol{B(OC_2H_5)_3 / C_6H_{15}BO_3}\)
• Molecular Weight: 145.99
• SMILES: CCOB(OCC)OCC
• HS Code: 2920909090
• UN Number: UN 1176
• IMDG Hazard Class: Class 3 Highly Flammable Liquid, Packing Group II
• Signal Word: Danger

2. Physicochemical Properties

1. Appearance: Colorless transparent low-viscosity liquid, mild faint ester odor
2. Melting Point: -84.5 °C
3. Boiling Point: 117–118 °C (760 mmHg)
4. Density (20°C): 0.858–0.864 g/mL
5. Refractive Index n20/D: 1.3720–1.3740
6. Flash Point (closed cup): 11 °C (ultra-high flammability)
7. Vapor Density: 5.04 (air=1); vapor accumulates at low ground level
8. Solubility: Miscible with ethanol, ether, toluene, acetone; rapidly hydrolyzes in water/moist air to generate boric acid precipitate and ethanol
9. Hygroscopicity: Strongly moisture-sensitive, must be sealed under inert gas
10. Stability: Stable under anhydrous nitrogen-sealed storage; incompatible with water, strong oxidants, strong acids, active metals
11. Hydrolysis feature: Exposed to humid air will turn turbid and form white boric acid solid residue

3. Standard COA Technical Specifications

Industrial Synthesis Grade ≥99.0%

Electronic/Semiconductor Ultra-High Purity Grade ≥99.9%

• Ultra-low moisture (<10 ppm), trace metal ions (Fe, Na, K <1 ppb), low free acid, used for thin film boron doping

Lab Reagent Grade ≥99.5%

• Strictly controlled hydrolysis impurities for organic boron lab synthesis and catalyst preparation

4. Main Industrial Applications

1. Semiconductor & Electronic Industry (High-Purity Grade)

• Boron doping source for silicon wafer, semiconductor chip manufacturing; precursor for boron oxide thin film deposition
• Raw material for electronic-grade borate ceramics, optical coating functional films

2. Organic Boron Chemical Intermediate (Largest Industrial Consumption)

• Core raw material for synthesizing organoboron catalysts, boronic acid/boronate ester building blocks for Suzuki coupling reaction (pharmaceutical & agrochemical synthesis)
• Transesterification reagent to prepare methyl borate, isopropyl borate and other alkyl borates

3. Welding & Metal Surface Flux

• High-efficiency welding flux for aluminum, magnesium alloy soldering; removes oxide film, improves weld joint smoothness
• Anti-oxidation additive for metal heat treatment

4. Coating, Resin & Adhesive Auxiliary

• Crosslinking catalyst for silicone resin, acrylic coating, polyurethane adhesive; improves coating weather resistance and adhesion
• Flame retardant additive for textile, plastic and polymer materials

5. Fuel & Lubricant Additive

• Anti-knock additive for gasoline; anti-oxidant and anti-wear modifier for engine lubricating oil

6. Laboratory Analytical Reagent

• Boron source for inorganic synthesis; derivatization reagent for GC testing of polyols and carbohydrates
• Standard raw material for preparing boric acid buffer solutions

5. Export Packaging & Storage Transportation

Standard Packing Options

1. Industrial bulk: 200L explosion-proof lined galvanized steel drum, nitrogen pre-sealed, net weight ~172kg/drum
2. IBC anti-static composite plastic tank: 1000L for large-volume factory feeding
3. Electronic grade/lab small packing: 1L / 2.5L amber pressure-resistant glass bottle filled with inert nitrogen
   
   
   All pallets wrapped with fully waterproof light-shield stretch film for sea transit

Storage & Transit Mandatory Rules

• Warehouse: Cool, dry, well-ventilated Class 3 flammable chemical warehouse, storage temperature ≤20°C, far away from heat, open flame, static sparks and humid environment
• Containers must remain fully nitrogen-sealed at all times to avoid moisture-induced hydrolysis
• Strict segregate from water sources, oxidants, strong acids, food raw materials, edible goods
• All loading/unloading equipment must be explosion-proof & anti-static, mandatory grounding operation
• Transport as IMDG UN 1176 Class 3 Flammable Liquid PG II; avoid high-temperature cargo holds, rain and violent collision during ocean shipment

6. GHS Hazard Statements & Mandatory PPE

Hazard Statements

• H225: Highly flammable liquid and vapor
• H319: Causes serious eye irritation
• H336: May cause drowsiness or dizziness via vapor inhalation
• H412: Harmful to aquatic life with long lasting effects

Mandatory PPE

• Organic vapor half-face respirator for high-concentration operation
• Fully sealed chemical safety goggles / full face shield
• Solvent-resistant nitrile rubber gloves
• Flame-retardant impermeable full-body protective overalls + anti-static rubber boots
• Closed explosion-proof local exhaust ventilation system for all transfer, sampling and feeding operations

Spill & First Aid Emergency Treatment

1. Spill disposal: Immediately isolate all ignition sources, evacuate irrelevant personnel; absorb leaked liquid with dry inert sand, prohibit water washing (accelerates hydrolysis and flammable vapor release); collect waste liquid into explosion-proof sealed hazardous waste steel barrel
2. Skin contact: Remove contaminated clothes instantly, rinse skin with plenty of soap and running water continuously for ≥15 mins
3. Eye contact: Flush eyes continuously with clean running water for 15 mins and seek emergency ophthalmic treatment
4. Inhalation: Move victim to fresh air at once; supply oxygen if dizziness, dyspnea or unconsciousness occurs
5. Ingestion: Do NOT induce vomiting, drink large volume clean water and rush to hospital

7. Foreign Trade Selling Points

1. Three complete grades: industrial synthesis grade, semiconductor electronic ultra-high purity grade, lab reagent grade to match diverse customer demands
2. Nitrogen-filled double-layer anti-moisture sealed packaging, effectively prevents hydrolysis turbidity and boric acid precipitation during long-distance ocean shipping
3. Complete full set Class 3 flammable dangerous goods export documents for smooth customs clearance
4. Flexible supply: Small trial drums, IBC bulk and full container FCL shipments acceptable
5. High boron content, stable transesterification reactivity, widely used in Suzuki coupling pharmaceutical intermediate factories

8. Full Set Export Supporting Documents

• Batch Certificate of Analysis (COA)
• English Version SDS Safety Data Sheet
• Dangerous Goods Packaging Certificate
• IMDG Maritime Dangerous Goods Declaration File
• Certificate of Origin
• Factory batch quality inspection report