Trimethyl Borate(CAS 121-43-7)
| Purity | Grade | Package | Stock | Price | Quantity |
| 99% | RG | 100ML | In Stock | 4 USD
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| 99% | RG | 500ML | In Stock | 11 USD
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| 99% | RG | 2.5L | In Stock | 51 USD
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| 99% | RG | 25L | In Stock | 497 USD
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| 99.5%+ (GC), redistilled grade | Re-steamed grade | 5ML | In Stock | 7 USD
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| 99.5%+ (GC), redistilled grade | Re-steamed grade | 25ML | In Stock | 16 USD
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| 99.5%+ (GC), redistilled grade | Re-steamed grade | 100ML | In Stock | 40 USD
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| 99.5%+ (GC), redistilled grade | Re-steamed grade | 500ML | In Stock | 128 USD
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Available NMR Spectrum
Verified In Stock
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Applications of 121-43-7
Trimethyl borate has several applications across different fields:
- Organic Synthesis: It serves as a crucial reagent in the preparation of boronic acids used in cross-coupling reactions.
- Production of Sodium Borohydride: As mentioned earlier, it is the main precursor in the synthesis of sodium borohydride.
- Fire Retardant: Trimethyl borate has been explored for use as a fire retardant due to its ability to form a protective layer when burned.
- Additive in Polymers: It has been examined as an additive to enhance certain properties of polymers.
Physical and chemical properties of 121-43-7
Boiling Point |
68 °C |
|---|---|
BRN |
1697939 |
Decomposition |
When heated to decomposition it emit acrid smoke and irritating fumes. |
Density |
Relative density (water = 1): 0.915 |
Exact Mass |
104.064476 |
Exposure Limits |
ACGIH: TWA 200 ppm; STEL 250 ppm (Skin) OSHA: TWA 200 ppm(260 mg/m3) NIOSH: IDLH 6000 ppm; TWA 200 ppm(260 mg/m3); STEL 250 ppm(325 mg/m3) |
Flash Point |
- 7 °C |
Index of Refraction |
Index of refraction: 1.3568 at 20 °C/D |
LogP |
-1.9 |
Melting Point |
-29 °C |
Merck |
14,9712 |
Molecular Formula |
C3H9BO3 |
Molecular Weight |
103.913 |
PSA |
27.69000 |
Sensitivity |
Moisture Sensitive |
Stability |
Stable. Incompatible with oxidizing agents. Decomposes slowly in the presence of moisture, rapidly in water. Flammable. |
Storage condition |
Store at <= 20°C. |
Vapour density |
Relative vapor density (air = 1): 3.6 |
Vapour Pressure |
Vapor pressure, kPa at 25 °C: 18 |
Water Solubility |
reacts |
Spectrums of 121-43-7
1.The NMR spectrum displayed on the page is a pre-sale reference spectrum and may differ from that of the actual received batch.
2.The accompanying documentation will include the NMR spectrum and purity analysis data for the shipped batch.
Retrosynthesis analysis of 121-43-7
Q&A for CAS 121-43-7
1. How can I verify product quality?
Every batch of our Chemical Reagents is tested to meet ISO 9001 standards. We provide COA & NMR & SDS Provided with each shipment. Batch COA available for verification, and third-party retesting is supported. A full refund is offered if our data is incorrect.
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Orders from Ready stock / In stock items typically Ships Tomorrow via Fast Shipping via FedEx/DHL/UPS. International deliveries usually arrive within 7 business days, subject to customs clearance.
3. What if the received product doesn’t meet quality standards?
If your Lab Grade Chemical Reagents do not match the Batch COA available, we will issue a replacement or a full refund upon verification.
4. Are hazardous labels included? How is safe shipping ensured?
Hazardous products are labeled and packaged following international regulations. We provide SDS Provided with all hazardous shipments to ensure safe and compliant transport.
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Yes. Our Lab Supplier team is available to assist with questions about product usage, storage, Lab Grade requirements, applications, and more.
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Yes, samples are available for selected Lab Grade products. Please submit a request to confirm availability and specifications.
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Yes. Items labeled In stock / Ready stock on our website are available for immediate shipment, usually within 1–2 business days. Large packs or custom specifications require lead time confirmation.
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Yes. We support customization of Lab Grade purity, packaging size, and special testing requirements. Share your needs and we’ll provide a tailored solution.
10. Is the COA consistent with the shipped batch?
Yes. Batch COA available matches the actual shipment. COAs shown online are for reference or from previous batches.
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Yes. We offer Lab Supplier services for stable batch consistency, pricing agreements, and safety stock for long-term customers to ensure uninterrupted supply.
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Download SDS of 121-43-7
Pictograms |
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|---|---|
Signal Word |
Danger |
Hazard Statements |
H225 Highly Flammable liquid and vapor H226 Flammable liquid and vapor H301 Toxic if swallowed H311 Toxic in contact with skin H312 Harmful in contact with skin H319 Causes serious eye irritation H331 Toxic if inhaled H360 May damage fertility or the unborn child H360FD May damage fertility; May damage the unborn child H370 Causes damage to organs |
Safety Data Sheet |
Download COA of 121-43-7
Operate under the ISO 9001 system


