Introduction to Search By CAS Number
The Chemical Abstracts Service (CAS) number is a unique numerical identifier assigned to every chemical substance described in the open scientific literature. Searching by CAS number is a crucial tool in the chemical industry, research institutions, and regulatory agencies. It allows for accurate identification and retrieval of information about specific chemicals, including their properties, uses, safety data, and availability from various suppliers. This method of searching ensures precision and reduces the chances of confusion that can arise from using common names or synonyms, as different chemicals may share the same or similar common names. Search By CAS Number

Top 10 Factories
1. Chongqing ACME Tech. Co., Ltd.
Chongqing ACME Tech. Co., Ltd. is a leading player in the chemical industry. It is committed to providing high – quality chemical products and services. The company has a state – of – the – art R & D center, where a team of experienced chemists conducts in – depth research to develop new and improved chemical solutions. Their production facilities are equipped with advanced machinery and follow strict quality control measures to ensure the consistency and purity of their products.
Features in Search By CAS Number:
- Their website https://www.surfadol.com/ has a well – designed search function that allows users to easily search for chemicals by CAS number. The search results are comprehensive, including detailed product information, specifications, and safety data sheets.
- They maintain a large and up – to – date database of chemicals, ensuring that most CAS numbers can be found on their platform.
Advantages:
- High – quality products: The company adheres to strict quality standards, and their products are widely recognized for their reliability and performance.
- Excellent customer service: Their customer support team is available 24/7 to assist customers with any inquiries related to product selection, ordering, or technical issues.
- Competitive pricing: They offer cost – effective solutions without compromising on quality, making them a preferred choice for many customers.
2. Sigma – Aldrich (now part of Merck KGaA)
Sigma – Aldrich is a well – known global chemical and life science company. With a long – standing history in the industry, it has built a reputation for providing a vast range of high – purity chemicals, biochemicals, and research reagents. The company serves a diverse customer base, including academic institutions, pharmaceutical companies, and research laboratories around the world.
Features in Search By CAS Number:
- Their online catalog has a powerful search engine that enables users to quickly find products by CAS number. The search results are accompanied by detailed product descriptions, application notes, and references.
- They offer a wide variety of product forms, such as different purities and packaging sizes for each CAS – numbered chemical, providing flexibility to customers.
Advantages:
- Extensive product portfolio: They have one of the largest collections of chemicals, covering almost every area of research and industry.
- High – quality standards: Their products are manufactured under strict quality control, ensuring reproducible results in scientific experiments.
- Global distribution network: They can deliver products to customers in different parts of the world in a timely manner.
3. TCI Chemicals
TCI Chemicals is a Japanese chemical company that specializes in the development, production, and sales of high – quality organic and inorganic chemicals. It has a strong focus on research and development, constantly introducing new and innovative chemical products to the market.
Features in Search By CAS Number:
- Their website has an intuitive search interface for CAS numbers. The search results provide detailed information about the product’s structure, properties, and synthesis methods.
- They offer custom synthesis services for chemicals with specific CAS numbers, meeting the unique needs of customers.
Advantages:
- Innovative product development: They are at the forefront of developing new chemical compounds, which can be beneficial for cutting – edge research.
- Technical expertise: Their team of chemists can provide technical support to customers regarding product selection and application.
- Good quality – to – price ratio: They offer competitive prices for their high – quality products.
4. Alfa Aesar (a Thermo Fisher Scientific brand)
Alfa Aesar is a leading manufacturer and supplier of research chemicals, metals, and materials. It has a global presence and serves a wide range of industries, including electronics, energy, and pharmaceuticals.
Features in Search By CAS Number:
- Their online store has a seamless search function for CAS numbers. It also provides related products and cross – references, helping customers to explore more options.
- They offer a large inventory of chemicals, ensuring quick availability of products with specific CAS numbers.
Advantages:
- Comprehensive product range: They offer a diverse range of chemicals and materials, suitable for various research and industrial applications.
- Stringent quality control: Their products are tested to meet high – quality standards, ensuring reliable performance.
- Global logistics support: They have an efficient logistics system to ensure timely delivery of products.
5. Tokyo Chemical Industry Co., Ltd.
Tokyo Chemical Industry Co., Ltd. is a major chemical manufacturer in Japan. It has a wide range of products, including fine chemicals, reagents, and materials for research and industrial use. The company is known for its commitment to quality and innovation.
Features in Search By CAS Number:
- Their website allows for easy searching of chemicals by CAS number. The search results include information on product availability, pricing, and delivery time.
- They provide detailed safety information for each CAS – numbered product, ensuring the safe handling and use of chemicals.
Advantages:
- High – quality products: Their products are known for their purity and consistency, which is crucial for scientific research.
- Strong R & D capabilities: They continuously invest in research and development to introduce new and improved products.
- Good after – sales service: They offer support to customers after the purchase, including technical advice and product replacement if necessary.
6. Merck KGaA
Merck KGaA is a global pharmaceutical, chemical, and life science company with a rich history and a strong presence in the international market. It operates in multiple segments, including healthcare, life science, and performance materials.
Features in Search By CAS Number:
- Their digital platform has a well – optimized search function for CAS numbers. It provides access to a vast database of chemicals, along with detailed product documentation and regulatory information.
- They offer a range of value – added services for chemicals with specific CAS numbers, such as product customization and technical training.
Advantages:
- Multifaceted expertise: With operations in different sectors, they can offer comprehensive solutions for various chemical – related needs.
- Global brand reputation: Their brand is associated with high quality and reliability, which gives customers confidence in their products.
- Strong regulatory compliance: They ensure that all their products meet the relevant regulatory requirements in different countries.
7. Fisher Scientific
Fisher Scientific is a well – established provider of scientific research supplies, including chemicals. It offers a wide range of products for laboratory use, from basic chemicals to advanced reagents.
Features in Search By CAS Number:
- Their online catalog has a user – friendly search option for CAS numbers. The search results display product images, specifications, and user reviews, helping customers make informed decisions.
- They have a network of local warehouses, which can ensure faster delivery of chemicals with specific CAS numbers.
Advantages:
- Wide product availability: They have a large inventory of chemicals, increasing the chances of finding the required CAS – numbered product.
- Educational resources: They provide educational materials and training programs related to chemical use and safety.
- Good customer loyalty program: They offer incentives and rewards to regular customers.
8. Acros Organics (part of Thermo Fisher Scientific)
Acros Organics is a company that focuses on providing high – quality research chemicals and reagents. It has a wide range of products for organic synthesis, analytical chemistry, and other research areas.
Features in Search By CAS Number:
- Their website has a powerful search engine that can quickly locate chemicals by CAS number. The search results include detailed product information, such as chemical structure, melting point, and boiling point.
- They offer a range of packaging options for each CAS – numbered product, allowing customers to choose the most suitable quantity.
Advantages:
- Specialized product range: They are experts in organic chemicals, providing high – purity substances for research purposes.
- Quality assurance: Their products are subject to strict quality control to ensure accurate and reproducible results.
- Technical support: Their team can provide technical assistance to customers during the product selection and use process.
9. Chem – Impex International, Inc.
Chem – Impex International, Inc. is a chemical company that offers a diverse range of chemicals, intermediates, and APIs. It has a global customer base and is known for its competitive pricing and reliable service.
Features in Search By CAS Number:
- Their online search function for CAS numbers is efficient. It provides information on product availability and lead time, helping customers plan their purchases.
- They offer custom manufacturing services for chemicals with specific CAS numbers, tailoring to the unique needs of customers.
Advantages:
- Cost – effective solutions: They offer products at competitive prices without sacrificing quality.
- Customization capabilities: The ability to provide custom – made chemicals is a significant advantage for customers with special requirements.
- Responsive customer service: Their customer support team is quick to respond to inquiries and resolve issues.
10. Combi – Blocks, Inc.
Combi – Blocks, Inc. is a leading provider of small molecule building blocks, libraries, and custom synthesis services. It is widely used in drug discovery and medicinal chemistry research.

Features in Search By CAS Number:
- Their website allows for easy searching of their extensive library of compounds by CAS number. The search results provide detailed information on the compound’s source, purity, and biological activity.
- They offer rapid delivery of compounds with specific CAS numbers, which is crucial for time – sensitive research projects.
Surfadol 500 Series Advantages:
- Innovative compound library: Their library contains a large number of unique small molecules, which can be valuable for new drug discovery.
- Fast turnaround time: They can quickly synthesize and deliver compounds, meeting the tight schedules of research projects.
- Collaboration opportunities: They are willing to collaborate with research institutions to develop new compounds.