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structure of 7440-25-7

Tantalum(CAS 7440-25-7)

CAS No.: 7440-25-7 Brand: MolBest
M. Ft.: Ta Cat. No: G3050982
M. Wt.: 180.95 MDL: MFCD00011252
Storage: Store in a cool,dry area. Use: For laboratory research use only
UN No.: UN 3089 4.1 /PG II
Purity Grade Package Stock Price Quantity
99.9%,60nm
Documents:COASDS
Extra Pure 1G In Stock 14 USD
99.9%,60nm
Documents:COASDS
Extra Pure 5G In Stock 34 USD
99.9%,60nm
Documents:COASDS
Extra Pure 25G In Stock 119 USD
99.9%,60nm
Documents:COASDS
Extra Pure 100G In Stock 305 USD
99.9%,60nm
Documents:COASDS
Extra Pure 500G In Stock 2443 USD
powder,99.9%,~200 mesh
Documents:COASDS
Extra Pure 1G In Stock 6 USD
powder,99.9%,~200 mesh
Documents:COASDS
Extra Pure 5G In Stock 14 USD
powder,99.9%,~200 mesh
Documents:COASDS
Extra Pure 25G In Stock 40 USD
powder,99.9%,~200 mesh
Documents:COASDS
Extra Pure 100G In Stock 140 USD
powder,99.9%,~200 mesh
Documents:COASDS
Extra Pure 500G In Stock 601 USD
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Applications of 7440-25-7

Tantalum's unique properties make it valuable across various industries:

  • Electronics: Used in capacitors and high-performance electronic components due to its excellent conductivity and stability.
  • Aerospace: Employed in jet engines and missile components because of its high melting point and strength.
  • Medical Devices: Utilized in surgical implants and instruments due to its biocompatibility.
  • Chemical Processing: Applied in equipment that handles corrosive substances, thanks to its resistance to acids.

Physical and chemical properties of 7440-25-7

Boiling Point

9797 °F

Density

16.65 (metal) 14.40 (powder)

Exact Mass

180.94800

Exposure Limits

ACGIH: TWA 0.5 ppm(2.5 mg/m3); Ceiling 2 ppm (Skin)
OSHA: TWA 3 ppm
NIOSH: IDLH 30 ppm(250 mg/m3); TWA 3 ppm(2.5 mg/m3); Ceiling 6 ppm(5 mg/m3)

Flash Point

>250 °C

Index of Refraction

Index of refraction: 2.05

LogP

-1 at 20℃

Melting Point

5425 °F

Merck

13,9143

Molecular Formula

Ta

Molecular Weight

180.94800

Odor

Odorless

resistivity

13.5 μΩ-cm, 20°C

Solubility

Insoluble

Stability

Stable. Powder is very flamable.

Storage condition

no restrictions.

Vapour Pressure

0 mmHg (approx)

Water Solubility

very resistant to attack by acids except HF, resistant to alkali solutions [KIR83]

Q&A for CAS 7440-25-7

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.

2. What is the delivery time?
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.

5. Do you offer technical support?
Yes. Our Lab Supplier team is available to assist with questions about product usage, storage, Lab Grade requirements, applications, and more.

6. Are volume discounts available?
Yes. For bulk orders of Chemical Reagents, we offer competitive pricing. Submit a quotation request and we’ll provide a tailored offer.

7. Do you provide samples?
Yes, samples are available for selected Lab Grade products. Please submit a request to confirm availability and specifications.

8. Do you have products in stock?
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.

9. Can you customize purity or packaging?
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.

11. Do you support long-term supply agreements?
Yes. We offer Lab Supplier services for stable batch consistency, pricing agreements, and safety stock for long-term customers to ensure uninterrupted supply.

12. What payment methods do you accept?
We accept Pay Local Currency via bank transfer (T/T), PayPal, and other methods. Credit terms are available for qualified long-term partners.

Download SDS of 7440-25-7

Pictograms

Signal Word

Danger

Hazard Statements

H228 Flammable solid
H252 Self-heating in large quantities; may catch fire

Safety Data Sheet

Download COA of 7440-25-7

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Operate under the ISO 9001 system