Deodorizer
Also called: blue liquid, blue chemical, tank treatment, portable toilet chemical
Deodorizer is the treatment added to a portable toilet's holding tank at each service: a blue dye that hides the contents, a fragrance, a surfactant and a biocide that slows the bacteria that produce odor. It comes as a liquid or a dissolvable packet.
The blue liquid is not a cleaner and does not break down waste; it buys time between services. Heat shortens that time, which is why units in July need more frequent service or a stronger dose than the same units in October.
Most operators now use formaldehyde-free deodorizers because many wastewater treatment plants restrict or refuse waste that contains formaldehyde. Enzyme and bio-based products are common alternatives.
See also: Formaldehyde-free deodorizer, Holding tank, Service visit
Questions that use this term
Search allHow are you handling the 2026 biodegradable deodorizer mandates?
Our state health department just sent out draft rules for 2026: all portable toilet deodorizers must be fully biodegradable and meet new toxicity…
Is the blue liquid in porta potties safe for the environment?
The blue liquid in a standard portable toilet is a deodorizer that is safe for the environment when the waste is disposed of properly at a wastewater…
Porta potty water splashed on me: is the blue liquid dangerous and can you get an infection from it? ✓ Solved
A splash of blue liquid is not dangerous if you wash it off promptly, which you did. The real risk depends on how full the holding tank was and how…
How to clean a porta potty between services without wrecking the deodorizer ✓ Solved
Use water and a damp cloth to clean a portable toilet between services, not a bucket of soapy water. Hector is right about avoiding bleach and…
What is the blue liquid in a porta potty and is it toxic? ✓ Solved
The blue liquid in a portable toilet is a deodorizer, and the formulas used in public spaces today are not toxic. It is a mixture of a blue dye,…
Formaldehyde vs formaldehyde-free porta potty deodorizer: what is the real difference?
Our venue coordinator asked my team to specify formaldehyde-free deodorizer for the standard portable toilets we're renting for a weekend festival.…
How are operators adapting to 2026's new biodegradable deodorizer rules?
I just got a heads-up from my supplier that a couple of states are planning to mandate fully biodegradable, formaldehyde-free deodorizers in portable…
Are formaldehyde-free deodorizers as effective in heat?
I'm running a 200-person construction site in Dallas through the summer. We have eight standard units and one ADA-compliant unit on level gravel,…