R1 to R5 are part of the Taski R-Series of cleaning chemicals used in housekeeping. These chemicals are used for a variety of cleaning tasks, including cleaning bathrooms, floors, and furniture. 

What each chemical is used for 

Taski R1: A bathroom cleaner and sanitizer

Taski R2: A general-purpose cleaner for hard surfaces

Taski R3: A glass and mirror cleaner

Taski R4: A furniture polish and maintainer

Taski R5: An air freshener

Taski R6: A toilet bowl cleaner

Taski R7: A floor cleaner that removes oil and grease

Taski R9: A bathroom cleaner for hard water locations