NIST Standard Reference Materials
NIST Standard Reference Materials (SRMs) are used by industry, government, and academia to ensure the highest quality measurements. Our website and catalog lists over 1100 individual reference materials produced and sold by NIST, each with carefully assigned values for chemical composition and physical properties.
www.nist.gov/srm

Particle characterization
Micromeritics is a leading supplier of particle characterization analytical laboratory instruments for R&D, QA/QC, production, and process control applications. Characteristics determined include: particle size, surface area, pore volume, pore size, material density, catalytic activity, and active surface area. A Materials Analysis Laboratory provides sample analyses on a contract basis. www.micromeritics.com

Malvern Instruments Ltd.
Malvern is a leading supplier of analytical solutions for particle characterization (size, shape, zeta potential, molecular weight) and rheological applications. Advanced technologies are combined with robust mechanical designs and comprehensive software to provide on-line, at-line and off-line solutions for QA/QC, control and development applications. An extensive support service facilitates the exploitation of any given system. www.malvern.co.uk

Mitsui Chemicals America, Inc.
Mitsui Chemicals America, a subsidiary of Mitsui Chemicals, is a leading supplier of fine and specialty chemicals, chemical solvents, specialty polymers, engineering plastics, functional and electronic materials and adhesive resins. Materials are used in a variety of applications in the automotive, paper, packaging, building and construction, pharmaceutical, healthcare, cosmetics, agrochemical and textile industries.
www.mitsuichemicals.com

Alfa Aesar
Free Research Chemicals Catalog
Alfa Aesar's 2003/04 Catalog features more than 22,000 research chemicals, metals and materials. There are over 1,200 new products, including organics, high purity inorganics, pure metals and precious metal compounds and catalysts. A new CD version with substructure search is now available as well. www.alfa.com...