|Quaternary Ammonium Salts
|Used as water repellents, fungicides, emulsifiers, paper and fabric softeners, antistatic agents, and corrosion inhibitors. Their use in cleaners & laundry fabric softeners, aerosol deodorants, aftershave lotions, anti-dandruff shampoos, hair colourings, mouthwashes, hand creams, shampoos & much more, came from the paper and fabric industries. Eye & skin irritants. Concentrations as low as 0.1 percent are irritating to the eye & mucous membranes . Ingestion can be fatal.|
|Quaternium-7, 15, 31, 60, etc||
Toxic chemical, causes skin rashes and allergic reactions. Formaldehyde
releasers. More effective against bacteria than against moulds and yeast.
Found in dishwashing products and some cosmetics.
See Nitrosating agents
May be a week skin sensitiser in susceptible individuals at greater than 1% in aqueous solution.
|Quercetin||A colourant, antioxidant in dark brown shades of hair dyes, food additives, dyeing hair pieces, supplements. Considered safe; may cause allergic reactions; teratogenic. On NIH hazards list.|
|Quillia Extract||Many plants (soap plants) contain substances called saponins which form a natural lather in water that is a gentle but effective natural cleaner and some have been used as an alternative to soap in shampoos, skin cleaners, soaps, food and beverage flavour. Generally regarded as safe|
|Quinine||An anaesthetic, flavouring in hair tonics, sunscreen preparations, tonic water, "bitter lemon" drinks, cold and headache remedies. Large or long-term dosages can cause headaches, skin rashes, intestinal cramps, tinnitus; cardiovascular and liver toxicity; teratogenic.|
|Quinoline||A solvent, colourant used in
manufacture of cosmetic dyes, preservative for anatomical specimens.
MSDS: Harmful in contact with skin and if swallowed. Irritating to
eyes. Hygroscopic (absorbs moisture from the air). Light sensitive.