Tetra Methyl Ammonium Hydroxide Pentahydrate

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Tetra Methyl Ammonium Hydroxide Pentahydrate

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Tetra Methyl Ammonium Hydroxide Pentahydrate Specification

Ph Level
>13 (in aqueous solution)

Smell
Ammoniacal, faint

Product Type
Tetra Methyl Ammonium Hydroxide Pentahydrate

Application
Photoresist developer in semiconductor industry, organic synthesis, ion-exchange, catalysis, pharmaceuticals

Refractive Rate
Not applicable (solid)

Grade
Analytical/Industrial

Storage
Store tightly sealed, in a cool, dry, well-ventilated place, protected from moisture/sources of ignition

Molecular Formula
C4H13NO5

Density
1.015 Gram per cubic centimeter(g/cm3)

Properties
Strong organic base, hygroscopic, readily dissolves in water, highly alkaline

Structural Formula
(CH3)4N(OH)5H2O

Physical Form
Solid (Crystalline)

Usage
Laboratory reagent, developer in lithography, etching agent

Poisonous
Yes, toxic if ingested or inhaled

Taste
Not defined; not for testing

Shape
Crystals

CAS No
10424-65-4

Molecular Weight
139.15 g/mol

Shelf Life
12 months (if properly stored)

HS Code
29239000

Solubility
Freely soluble in water, alcohols

EINECS No
234-002-0

Melting Point
60-62C (approx)

Appearance
White to off-white crystalline solid

Purity
>= 99%

Ingredients
Tetra Methyl Ammonium Hydroxide, Water (Pentahydrate)

Tetra Methyl Ammonium Hydroxide Pentahydrate Trade Information

Main Export Market(s)
Central America, Australia, Western Europe, Middle East, Eastern Europe, South America, Asia, North America, Africa

Main Domestic Market
All India

About Tetra Methyl Ammonium Hydroxide Pentahydrate

Tetramethylammonium hydroxide pentahydrate (TMAH) is a chemical compound with the molecular formula (CH₃)4NOH5H₂O. It is a white or colorless crystalline solid that is highly soluble in water and organic solvents.

TMAH pentahydrate is a strong base and is commonly used as a developer in the semiconductor industry for the wet etching of silicon and other materials. It is also used as a solvent in organic synthesis and as a reagent for the determination of elements such as boron and phosphorus.

In the semiconductor industry, TMAH pentahydrate is used as a developer to selectively remove layers of materials such as silicon dioxide and silicon nitride from silicon wafers. It is also used in photolithography processes to remove exposed photoresist.

In organic synthesis, TMAH pentahydrate is used as a solvent for the dissolution of various organic compounds and as a reagent for the deprotection of protective groups in organic molecules.

TMAH pentahydrate is a highly alkaline compound and should be handled with care. It can cause severe skin and eye irritation and can be harmful if ingested or inhaled. Appropriate protective equipment should be worn when handling TMAH pentahydrate, and it should be used only in a well-ventilated area.

FAQ

1. What is tetramethylammoniumhydroxide pentahydrate, exactly?

Ans - Strong, colourless base known as tetra methyl ammonium hydroxide pentahydrate (TMAH) is frequently used in semiconductor production. Tetramethylammonium hydroxide and tetramethylammonium hydrate are other names for it.

2. What purposes does TMAH serve?

Ans - TMAH is frequently employed in the manufacture of semiconductors as a gate dielectric, a wet etch stop layer, and an etchant. Additionally, it serves as a cleaning agent and is utilised in chemical mechanical polishing.

3. Where is TMAH kept?

Ans - The best place to keep TMAH is somewhere cool, dry, and away from any heat sources. Additionally, it should be stored away from potent oxidising substances like chlorine and peroxides.

4. How harmful is TMAH?

Ans - Strong bases like TMAH can irritate the skin and eyes. When handling it, caution should be taken and safety gear should be worn.

5. How long does TMAH have a shelf life?

Ans - If TMAH is correctly stored, its shelf life is unbounded. But it must be frequently examined for contamination or deterioration.

Exceptional Purity for Advanced Applications

With a purity level of at least 99%, Tetra Methyl Ammonium Hydroxide Pentahydrate is ideal for analytical and industrial use. Its strong base and excellent solubility make it a preferred choice for demanding reactions in laboratories and semiconductor manufacturing.

Safety and Storage Guidelines

This compound is corrosive and toxic if ingested or inhaled. Always handle with proper ventilation and personal protective equipment. Store in a tightly sealed container, away from moisture and sources of ignition, to maintain optimal shelf life and product integrity.

Versatile Industrial and Laboratory Utility

Tetra Methyl Ammonium Hydroxide Pentahydrate serves as a crucial reagent for photoresist development in the lithography process, as well as an effective etching agent and catalyst in organic synthesis. Its usefulness extends to applications in ion-exchange and the pharmaceutical sector.

FAQs of Tetra Methyl Ammonium Hydroxide Pentahydrate:

Q: How should Tetra Methyl Ammonium Hydroxide Pentahydrate be stored for maximum shelf life?

A: To ensure a shelf life of up to 12 months, keep the crystalline solid in a tightly sealed, airtight container or HDPE drum. Store it in a cool, dry, well-ventilated area, protected from moisture and sources of ignition.

Q: What are the recommended handling precautions when working with this compound?

A: Always use adequate ventilation and wear appropriate personal protective equipment such as gloves and eye protection. Avoid inhaling dust and prevent any contact with skin or eyes, as the substance is highly corrosive and toxic.

Q: When is Tetra Methyl Ammonium Hydroxide Pentahydrate typically used in industry?

A: It is primarily utilized as a developer for photoresists in the semiconductor industry and in organic synthesis, etching, ion-exchange processes, catalysis, and pharmaceutical manufacturing due to its strong basic properties.

Q: Where can this chemical be safely transported and under what regulations?

A: The compound must be transported following hazardous materials regulations (Hazard Class 8, UN 2923) and should be packed in airtight containers or HDPE drums to prevent exposure and contamination.

Q: What benefits does this compound offer in semiconductor processing?

A: Its high alkalinity, purity, and excellent solubility make it exceptionally effective as a photoresist developer and etching agent, ensuring precise patterning in semiconductor lithography and fabrication.

Q: What should be done in case of accidental exposure or spillage?

A: In the event of exposure, immediately flush the affected area with water and seek medical attention. Spills should be contained and cleaned using appropriate protective equipment, while ensuring adequate ventilation.

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