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/418/501/product-dating-information-06-25-mk.pdf
334901
Tetramethylammonium hydroxide solution
25 wt. % in methanol, solution
Synonym(s):
N,N,N-trimethyl-methanaminium hydroxide, TMAH, TMAOH
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
100 mL | Available to ship TODAYfromMILWAUKEE | $60.40 $51.34 |
500 mL | Available to ship TODAYfromMILWAUKEE | $147.00 |
4 x 100 mL | Available to ship TODAYfromMILWAUKEE | $234.00 $175.50 |
About This Item
$51.34
List Price$60.40Save 15%Available to ship TODAYDetails
Product Name
Tetramethylammonium hydroxide solution, 25 wt. % in methanol
vapor pressure
17.5 mmHg ( 20 °C)
Quality Segment
form
liquid
reaction suitability
core: ammonium, reaction type: phase-transfer
concentration
25 wt. % in methanol
impurities
≤10% water, ≤2% chloride
density
0.866 g/mL at 25 °C
functional group
amine
SMILES string
[OH-].C[N+](C)(C)C
InChI
1S/C4H12N.H2O/c1-5(2,3)4;/h1-4H3;1H2/q+1;/p-1
InChI key
WGTYBPLFGIVFAS-UHFFFAOYSA-M
General description
Tetramethylammonium hydroxide is a quaternary ammonium salt generally used as an anisotropic etchant for silicon due to its high silicon etching rate.
Application
1 of 1
This Item | ||
|---|---|---|
| description 25 wt. % in methanol | description ACS reagent | description 10 wt. % in H2O |
| concentration 25 wt. % in methanol | concentration 1.0 M±0.02 M in H2O | concentration 10 wt. % in H2O |
| Quality Level 200 | Quality Level 200 | Quality Level 100 |
| form liquid | form liquid | form - |
| impurities ≤10% water, ≤2% chloride | impurities - | impurities - |
| density 0.866 g/mL at 25 °C | density 1.005 g/mL at 25 °C | density 1.006 g/mL at 25 °C |
| vapor pressure 17.5 mmHg ( 20 °C) | vapor pressure - | vapor pressure 17.5 mmHg ( 20 °C) |
Still not finding the right product?
Explore all of our products under Tetramethylammonium hydroxide solution
Signal Word
Danger
Hazard Codes
Precautionary Statements
Hazard Classifications
Acute Tox. 2 Dermal - Acute Tox. 2 Oral - Acute Tox. 3 Inhalation - Aquatic Chronic 3 - Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B - STOT RE 1 Dermal - STOT SE 1
Target Organs
Eyes,Central nervous system, Liver,thymus
Storage Class
3 - Flammable liquids
WGK
WGK 3
Flash Point (°F)
80.6 °F - closed cup
Flash Point (°C)
27 °C - closed cup
PPE (personal protective equipment)
Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
Choose from one of the most recent versions:
Already Own This Product?
Find documentation for the products that you have recently purchased in the Document Library.
-
How can I determine the shelf life / expiration / retest date of this product?
1 answer-
Helpful?
-
-
How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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
Helpful?
-