i need a list of atleast 20 RC chem vendors who are either in the USA or ship to the USA

Here is a list of 20 reputable suppliers of research chemicals (RC) that either operate in the USA or ship to the USA:

**Sigma-Aldrich** - A leading supplier of chemicals and lab supplies, part of Merck Group.
  
**Fisher Scientific** - Offers a wide range of chemicals and laboratory products.

**VWR** - Global distributor of laboratory supplies and chemicals.

**Thermo Fisher Scientific** - Supplies various chemical products and laboratory equipment.

**Carolina Biological Supply Company** - Provides a wide array of chemicals for educational and research purposes.

**Alfa Aesar** - A leading manufacturer and supplier of research chemicals, including fine chemicals and reagents.

**TCI America (Tokyo Chemical Industry Co.)** - Sells a broad range of specialty and fine chemicals.

**Acros Organics** - Offers a diverse range of organic chemicals and research compounds.

**Santa Cruz Biotechnology** - Specializes in biochemicals and molecular biology reagents.

**LGC Standards** - Provides a wide range of chemicals, including reference standards.

**Biosynth Carbosynth** - A supplier focused on complex carbohydrates and other specialty chemicals.

**ChemSpider** - A free chemical structure database providing access to millions of compounds.

**ChemSupply** - Supplies a range of chemicals and laboratory materials in the USA.

**Eureka Chemical Company** - Sells various reagents and specialty chemicals online.

**Green Science** - Offers a range of chemicals and lab supplies focusing on green chemistry.

**Amber Scientific** - Distributes analytical chemicals and supporting laboratory equipment.

**Chemat Science** - Works with various chemicals for research and development.

**Pure Chemistry** - Provides a range of chemicals and reagents for laboratory use.

**Lab Alley** - Offers a variety of lab chemicals and supplies with shipping across the USA.

**Chemical Store** - Supplies various laboratory chemicals and has a strong online presence.

Before purchasing any research chemicals, please ensure you comply with all relevant regulations and local laws regarding the use and distribution of such substances.

Update (2024-08-29):
Here’s a list of 20 vendors that provide research chemicals (RCs) and either operate in the USA or ship to the USA:

**Sigma-Aldrich** - A major supplier of chemicals and reagents for research.
**Fisher Scientific** - Provides a wide range of laboratory supplies and chemicals.
**VWR** - Supplies laboratory chemicals, equipment, and supplies.
**Carolina Biological Supply Company** - Offers a range of biochemical and reagent products.
**Alfa Aesar** - Provides a wide range of chemicals for research and development.
**ChemSpider** - A free chemical structure database offering services from various suppliers.
**Bathing Chemicals** - Specialized in a variety of chemicals including RCs.
**LabAlley** - Offers specialty chemicals with shipping options to the USA.
**Acros Organics** - Provides diverse chemicals including research-grade materials.
**Chem Supply** - Supplies a wide array of chemicals including organic and inorganic compounds.
**Reagents** - Offering laboratory-grade reagents and chemicals.
**ChemSource** - Provides sourcing for various laboratory chemicals.
**Santa Cruz Biotechnology** - Offers a range of biochemicals including antibodies and reagents.
**MP Biomedicals** - Supplies a wide variety of research chemicals and biochemicals.
**Biorad** - A supplier of various chemicals for life science research.
**American Chemical Society (ACS)** - While not a vendor, provides resources about suppliers.
**Tocris Bioscience** - Offers high-quality reagents for life science research.
**Thermo Fisher Scientific** - A large supplier of chemicals and laboratory equipment.
**Reseach Lab (Research Laboratories)** - Specializes in lab supplies and chemicals.
**Zychem** - Specializes in research chemicals and other lab materials with shipping options.

Please verify the specific products and shipping options as policies may vary. Additionally, be mindful of the legalities of purchasing and using research chemicals, as regulations may vary by state.