H & S Chemical Co., Inc. 
H L Bouton
Haemo-Sol
Hagan
Halotron
Hangsterfer's Laboratories
Hankin Ozone Systems, Ltd.
Hardener
HE
Health Sonics Corp.
Helena Chemical Company Taper le caractère "%" dans "brand list" et cliquer sur "search"
Henry Company
Heraeus Kulzer, Inc.
Hercules Plumbing Products
Hercules Plumbing Products (liste par catégorie de produits)
Hewlett Packard
Hexcel Corporation  
High Purity Standards
Hill Brothers Chemical Company
Hillyard Aerosol Products
Hillyard Products
Hin-Cor Industries, Inc. 
Hirshfield's Paint Manufacturing
HL Bouton  
Hooper Welding Supply
HooperWelding Supply
Horizon Distributors
Horticultural Alliance, Inc.  
Hortus USA Corp.  
Household
HP08
Humic Plus 9-1-5
Hummel Croton, Inc.
Hydro Safe Oil Division Inc.
HydroEngineering, Inc.  
Hyvac Products, Inc.