Secure Your Supply: Pure Hexamethyldisilazane (HMDS) for Surface Science!

• CAS No.: 999-97-3
• Formula: C6h19nsi2
• EINECS: 213-668-5
• Appearance: Liquid
• Usage: Coating Auxiliary Agents, Surfactants
• Color: Colorless
• Purity: ≧99.5%
• Density: 0.774G/Ml
• Odor: Ammonia Odor
• Storage Temp.: Below 30ºC
• Transport Package: 200kg/Drum
• Specification: Hexamethyldisilazane
• Trademark: Chenghexin
• Origin: China
• HS Code: 2931000001
• Production Capacity: Over 5000 Tons/Year

Product Description

Description

Bis(trimethylsilyl)amine (also known as hexamethyldisilazane and HMDS) is an organosilicon compound with the molecular formula [(CH₃)₃Si]₂NH. The molecule is a derivative of ammonia with trimethylsilyl groups in place of two hydrogen atoms. An electron diffraction study shows that silicon-nitrogen bond length (173.5 pm) and Si-N-Si bond angle (125.5°) to be similar to disilazane (in which methyl groups are replaced by hydrogen atoms) suggesting that steric factors are not a factor in regulating angles in this case. This colorless liquid is a reagent and a precursor to bases that are popular in organic synthesis and organometallic chemistry. Additionally, HMDS is also increasingly used as molecular precursor in chemical vapor deposition techniques to deposit silicon carbonitride thin films or coatings.

 

HMDS in Surface Science

HMDS has several valuable uses in surface science as it can be used as a coating material, a modification agent, or a surface passivation agent. We will discuss each of these applications in more detail below.

Coating Material

HMDS is used as a coating material in the semiconductor industry before applying a photoresist. When HMDS is deposited on a surface, it leaves methyl groups behind. These then bond with the OH molecules on the silicon surface and help develop a strong adhesion when a photoresist is applied.

Modification Agent

Surface modification of certain compounds can be conducted with HMDS as it is feasible and only has ammonia as a byproduct. The most commonly modified surfaces with HMDS include silica aerogels, which are rendered hydrophobic during the process.¹ The option to modify silica aerogels is necessary for areas of semiconductor and pharmaceuticals as changing their chemical properties make them more suitable for specific applications. Modifying the surface of materials can make them more compatible with surface analysis techniques such as scanning electron microscopy (SEM) and transmission electron microscopy (TEM). 

Surface Passivation Agent 

Surface passivation is a chemical process conducted to increase the surface properties of a material so it better resists corrosion and contamination. When HMDS is used for surface passivation, it develops a layer that acts as a coating. This process is used after a product has been fabricated and helps produce a more robust product.

  

Safety Information

 

Hazard Codes	F,C,Xn
Risk Statements	11-20/21/22-34-52/53
Safety Statements	16-26-36/37/39-45-61
RIDADR	UN 3286 3/PG 2
WGK Germany	2
RTECS	JM9230000
F	21
Autoignition Temperature	325 °C
Hazard Note	Flammable
TSCA	Yes
HS Code	2931 90 00
HazardClass	3
PackingGroup	II
Hazardous Substances Data	999-97-3(Hazardous Substances Data)
Toxicity	LDLO i.p. in mice: 650 mg/kg (Petrarch Systems Inc. Product Information Sheets)

 

Uses

Hexamethyldisilazane mainly used as methyl silane alkylation (such as amikacin, penicillin, cephalosporins and kinds of penicillin derivatives), hydroxyl protectants of antibiotics. It is used as surface treatment agent of diatomite, white carbon black, titanium and blond additives of photoresist in the semiconductor industry. It is used as treatment agent of tearing strength resistance. It is used as a solvent in organic synthesis and organometallic chemistry. It is used as an adhesion promoter for photoresist in photolithography. it is used for the preparation of trimethylsilyl ethers from hydroxy compounds. It is used as an alternative to critical point drying during sample preparation in electron microscopy. It is added to analyte to get silylated diagnostic products during pyrolysis in gas chromatography- mass spectrometry.
 

Our Advantages

 

Product Quality Advantages
 

Vast Production Capacity   With an annual production capacity of 5,000 tons, we guarantee a long-term and stable supply to meet your needs.

Innovative Separation Technology   Our research and development team, consisting of 28 highly skilled professionals, pioneers in separation technology, ensures our leading edge in product innovation and development.

Unmatched Product Purity for Hexamethyldisilazane   Our Hexamethyldisilazane achieves an extraordinary level of purity, over 99.5%, establishing a new industry standard for excellence. Furthermore, our stringent control over moisture content minimizes the risk associated with boiling point shifts and ensures the stability of Hexamethyldisilazane under various conditions, preventing its decomposition at critical temperatures.
 

 

FAQ

1. Can I get samples?
Yes, free samples are available. 
Samples will usually be sent out within 1-3 working days.

2. Do you accept customized orders?
Yes, both product and package can be customized.
 
3. What is the payment terms?
TT, LC, DP are available.
Please note that OME orders require payment prior to shipment.

4. What is the lead time for mass production?
Delivery time depends on product type and quantity.
Our company has a digital ordering system to ensure scientific and reasonable scheduling of orders, please consult the sales staff you contacted.

5. How to guarantee the product quality?
We have a complete raw material inspection, quality control and pre-factory inspection system to ensure that the order delivered to you is in line with the contract.
In addition, it also supports third-party inspection before shipment. If the inspection fails, the customer's payment will be refunded, and the loss caused by the breach of contract will be compensated.

6. How to check the order status after payment?
After the order is confirmed, the merchandiser will follow up every week and update the order status to you by email.

7. How to deal with after-sales problems?
The after-sales service implements the order responsibility system, and the salesman is the first responsible person for the order. The after-sales service department will set up a service team after receiving the complaint. They will complete the incident investigation and provide you with a resolution within 72 hours.

Why Choose Us

Over Two Decades of Expertise  Leverage our extensive 22+ years of experience to guide every phase of your order, ensuring a seamless and worry-free process.

Comprehensive Order Supervision   From the moment you reach out to us, every step of your order is meticulously supervised to alleviate any concerns you might have.
   --Engage with our dedicated sales team for swift responses within 12 hours.
   --Gain clarity on quality, price, payment terms, packaging, and delivery timelines to facilitate your decision-making.
   --Shipping information is promptly shared on the departure day.
   --Stay informed at each stage until the successful receipt of your shipment.

Expert Loading Report Services   An external team meticulously inspects loading operations to ensure everything is in perfect order, backed by a detailed Loading Report for each shipment, with prior samples available upon request.

Unbeatable Pricing   Our profound industry insight, coupled with strong partnerships with select manufacturers, enables us to offer the most competitive prices.

Quality Assured Products   We only approve products that meet the highest international standards and regulations.

Strategic Warehouse Solutions   With our warehouse services, we ensure a stable supply for our clients, buffering against the volatility of material prices.

 

Company Profile

 

Sincere Chemical Co., Ltd., established in 2021, is located in the Huarun Mansion, Longhua District, Haikou City, Hainan Province, boasting a brand-new, ultra 5A-level office environment. Based on the profound corporate culture of Shijiazhuang Chenghexin Chemical, which has more than 20 years of experience, the company fully supports the development of import and export-related businesses for its Hainan branch. The company has a harmonious atmosphere, generous benefits, and offers substantial room for growth.

Since its inception, the company has always adhered to the development philosophy of "integrity, stability, innovation, and precision". It continuously explores and innovates, enhancing the R&D and production capabilities of new products. The company's products are constantly optimized and perfected, and it maintains long-term stable cooperation with domestically powerful factories as well as national and provincial scientific research institutes. This ensures that the products' technology is advanced, quality is stable, and prices are competitive, now forming a professional chemical raw material supply enterprise that combines science, industry, and trade with both domestic and international trade.

In recent years, the company has won several national and provincial awards and titles for being a trustworthy enterprise and has been recognized as a quality and efficiency-oriented enterprise. It has also received accolades and recommendations from internet companies like Baidu, and HC.com; particularly, it has been featured in a special interview and promotion by the CCTV Securities Information Channel's "Brand Power" program.

After more than 20 years of efforts, the company has continued to grow and expand. Its client base includes highly influential local enterprises, listed companies, and Fortune 500 companies, earning long-term trust and support from both new and old customers. With a bright future ahead, all employees are confident in the company's development.