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GERMICIDE – Any substance that kills germs. A disinfectant.

GROUT – Matrix between ceramic tile on walls and floors.

HAND CLEANSER – A cleaner designed to clean hands with an emphasis on removing oils, grease and other occupational soils.

HARD WATER – Water containing soluble salts of calcium and magnesium, and sometimes iron.

HAZARDOUS MATERIAL – Any substance having the properties capable of producing adverse effects on the health or safety of people.

HOSPITAL-TYPE DISINFECTANT – Kills most germs due to a special combination of disinfectant ingredients. More terminology than fact.

HYDROCHLORIC ACID (HCL) – Also known as muriatic acid. Used in toilet bowl cleaners in varying dilutions. Hydrogen Chloride.