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331635

Sigma-Aldrich

四甲基氢氧化铵 溶液

25 wt. % in H2O

别名:

TMAH溶液

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About This Item

线性分子式:
(CH3)4N(OH)
CAS号:
75-59-2
分子量:
91.15
Beilstein:
3558708
MDL编号:
MFCD00008280
UNSPSC代码:
12352100
PubChem化学物质编号:
24859984
NACRES:
NA.21
价格与库存信息目前不能提供

蒸汽压

17.5 mmHg ( 20 °C)

质量水平

200

表单

liquid

浓度

25 wt. % in H2O

折射率

n20/D 1.3806

密度

1.016 g/mL at 25 °C

官能团

amine

SMILES字符串

[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

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相关类别

一般描述

四甲基氢氧化铵溶液是一种常用的强碱[1] 和有机合成反应中的亲核基团源[2]。

应用

四甲基氢氧化铵是一种季铵盐，由于其具有高硅蚀刻速率，常被用作硅的各向异性蚀刻剂。[3][4]
四甲基氢氧化铵溶液（25wt.％水溶液）可用作调节pH的碱，以制备得到六方中孔铝磷酸盐（TAP）。[5]

警示用语：

Danger

危险分类

Acute Tox. 1 Dermal - Acute Tox. 2 Oral - Aquatic Chronic 2 - Eye Dam. 1 - Skin Corr. 1B - STOT RE 1 Dermal - STOT SE 1

靶器官

Central nervous system, Liver,thymus

储存分类代码

6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 3

闪点(°F)

Not applicable

闪点(°C)

Not applicable

个人防护装备

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter

历史批次信息供参考:

分析证书(COA)

Lot/Batch Number
MKCW3535
MKCT0106
MKCQ9160
MKCN5777
MKCL5836

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四丁基氢氧化铵 溶液 40 wt. % in H2O

Sigma-Aldrich

178780

四丁基氢氧化铵 溶液

Palladium-mediated carboxylation of aryl halides (triflates) or benzyl halides using [13 C]/[11 C] carbon monoxide with tetrabutylammonium hydroxide or trimethylphenylammonium hydroxide
Karimi F, et al.
Journal of the Chemical Society. Perkin Transactions 1, 20, 2256-2259 (2002)
Tetramethylammonium Hydroxide
Knight J
eEROS (Encyclopedia of Reagents for Organic Synthesis) (2001)
Synthesis of mesoporous hexagonal titanium aluminophosphate molecular sieves and their catalytic applications
Kapoor MP & Raj A.
Applied Catalysis A: General, 203(2), 311-319 (2000)
Study on anisotropic silicon etching characteristics in various surfactant-added tetramethyl ammonium hydroxide water solutions.
Yang CR, et al.
Journal of Micromechanics and Microengineering, 15(11), 2028-2028 (2005)
The characteristic behavior of TMAH water solution for anisotropic etching on both silicon substrate and SiO 2 layer.
Chen PH, et al.
Sensors and actuators A, Physical, 93(2), 132-137 (2001)
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Questions

1–3 of 3 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. 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?

  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. 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

      Helpful?

  3. Hi Can I ask if this 25% TMAH in water (331635) is ultra pure or analytical grade? Thanks

    1 answer

    1. This product is not tested or recommended for a specific application and is intended for general research use. The material is tested to verify concentration only. Please see the link below to review a sample or lot specific Certificate of Analysis:
      https://www.sigmaaldrich.com/product/sial/331635#product-documentation

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