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structure of 7439-91-0

Lanthanum(CAS 7439-91-0)

CAS No.: 7439-91-0 Brand: MolBest
M. Ft.: La Cat. No: G5403591
M. Wt.: 138.91 MDL: MFCD00011066
Storage: Store in a cool,dry area. Use: For laboratory research use only
UN No.: UN 3264 8 /PG III
Purity Grade Package Stock Price Quantity
99.9%
Documents:COASDS
Extra Pure 5G In Stock 13 USD
99.9%
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Extra Pure 25G In Stock 30 USD
99.9%
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Extra Pure 100G In Stock 152 USD
99.9%
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Extra Pure 500G In Stock 719 USD
99.99%,200mesh
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Extra Pure 25G In Stock 50 USD
99.99%,200mesh
Documents:COASDS
Extra Pure 100G In Stock 155 USD
99.99%,200mesh
Documents:COASDS
Extra Pure 500G In Stock 719 USD
99.99%,200mesh
Documents:COASDS
Extra Pure 2.5KG In Stock 3257 USD
Granule 99.9% (Reduced state La/RE) 3-5cm
Documents:COASDS
Extra Pure 100G In Stock 149 USD
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Physical and chemical properties of 7439-91-0

Appearance of Characters

slugs

Boiling Point

3464 °C(lit.)

Density

6.19 g/mL at 25 °C(lit.)

Exact Mass

138.90600

Exposure Limits

ACGIH: TWA 2 ppm; STEL 4 ppm
OSHA: TWA 2 ppm(5 mg/m3)
NIOSH: IDLH 25 ppm; TWA 2 ppm(5 mg/m3); STEL 4 ppm(10 mg/m3)

Melting Point

920 °C(lit.)

Merck

13,5379

Molecular Formula

La

Molecular Weight

138.90500

resistivity

54 μΩ-cm

Sensitivity

Air & Moisture Sensitive

Stability

Stable.

Water Solubility

slowly decomposes in H2O; readily attacked by mineral acids [MER06]

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Pictograms

Signal Word

Danger

Hazard Statements

H228 Flammable solid
H260 In contact with water releases flammable gases which may ignite spontaneously

Safety Data Sheet

Q&A for CAS 7439-91-0

1. How can I verify product quality?
Every batch is tested in accordance with ISO 9001 requirements. We provide a Certificate of Analysis (COA), NMR spectrum, purity report, and test methods with each shipment. Third-party retesting is supported, and we offer a full refund if our data is incorrect.

2. What is the delivery time?
Orders are shipped on the second business day via FedEx, DHL, or UPS. International deliveries typically arrive within 7 business days (subject to customs clearance).

3. What if the received product doesn’t meet quality standards?
If the product does not match the COA or has a quality issue, we will issue a full refund or replacement upon verification.

4. Are hazardous labels included? How is safe shipping ensured?
Hazardous products are labeled and packaged in compliance with international regulations and shipped with an up-to-date Safety Data Sheet (SDS) to ensure safe and compliant transport.

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

6. Are volume discounts available?
Yes. We offer competitive pricing for bulk orders. Please submit a quotation request, and we’ll provide a customized offer.

7. Do you provide samples?
Yes, samples are available for select products for testing and validation. Please submit a sample request or contact our sales team to confirm availability and specifications.

8. Do you have products in stock?
Items marked “In Stock” on our website are ready 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 purity, packaging size, and special testing requirements. Please share your detailed needs, and we’ll provide a solution.

10. Is the COA consistent with the shipped batch?
Yes. The COA provided with your shipment matches the actual batch and includes the batch number. COAs shown online are for reference or from previous batches.

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

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

Applications of 7439-91-0

Lanthanum has several important applications across various industries:

  • Catalysts: Lanthanum oxide is used as a catalyst in petroleum refining and in catalytic converters for automobiles.
  • Optical Glasses: Due to its high refractive index, lanthanum oxide is incorporated into optical glasses for lenses and prisms.
  • Phosphors: Lanthanum compounds are utilized in phosphorescent materials for lighting and display technologies.
  • Hydrogen Storage: Lanthanum hydride is explored for use in hydrogen storage systems due to its ability to absorb hydrogen gas.

Retrosynthesis analysis of 7439-91-0


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