If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf
455199
Tetrakis(dimethylamido)hafnium(IV)
≥99.99%
Synonym(s):
TDMAH, Tetrakis(dimethylamino)hafnium(IV)
About This Item
Recommended Products
Quality Level
Assay
≥99.99%
form
low-melting solid
reaction suitability
core: hafnium
mp
26-29 °C (lit.)
density
1.098 g/mL at 25 °C
SMILES string
CN(C)[Hf](N(C)C)(N(C)C)N(C)C
InChI
1S/4C2H6N.Hf/c4*1-3-2;/h4*1-2H3;/q4*-1;+4
InChI key
ZYLGGWPMIDHSEZ-UHFFFAOYSA-N
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General description
Application
- As an atomic layer deposition(ALD) precursor for deposition of hafnium oxide thin films for advanced semiconductor devices.[1]
- As a precursor to fabricate polymer-derived ceramic nanocomposites.[2]
- To prepare HfO2, CeO2, and Ce-doped HfO2 thin films on Ge substrates by using tris(isopropyl-cyclopentadienyl)cerium [Ce(iPrCp)3] precursors with H2O via ALD method.[3]
- To produce Hf3N4 thin films with TDMAH and ammonia at low substrate temperatures at 150−250 °C.[4]
Analysis Note
accessory
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Flam. Sol. 1 - Skin Corr. 1B - Water-react 2
Supplementary Hazards
Storage Class Code
4.3 - Hazardous materials which set free flammable gases upon contact with water
WGK
WGK 3
Personal Protective Equipment
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How is shipping temperature determined? And how is it related to the product storage temperature?
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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