text: if we wash the polystrene container after using it and reuse it,is it healthy?? well,sometimes we may need to pack food in a container,so we just wash the polystrene (well, you know, that white, light container people usually use to pack foods when we buy food from outside.....oh yes, we use polystrene cups at parties too!!!) container we had used before and reuse it to pack our food.....is it healthy to eat the food?? will there be any chemical reaction occuring when we wash the polystrene container?? - try not to reuse once the polystrene is broken or pierced.   - good for building material, not so wise eating from them.  - prefereably, try to dispose of it in the best manner possible at your local county council or jurisdiction. (iv) although there are methods to breakdown this material, (v) it is generally not friendly to biodegrade process and rather toxic.(vi)  - a mix of wet dry conditions with temperatures between 40ºf (4ºc) and 110ºf (43ºc), may encourage bacteria over time. incidently, they are great for containing and forming mold cultures in a laboratory.   (i) "aaldehyde and carboxyl groups were the oxidation end products."  (ii) "absorbed through the lungs, skin, and intestines; styrene biotransforms into a carcinogen and a mutagenic compound."  (iii) "...the trays would be intended to contact food for no longer than six to eight hours at 50°f or below."  "the key provision sets a dietary concentration...equivalent to 1.5 micrograms/person/day based on a diet of 1귔 grams of solid food and 1귔 grams of liquid food per person per day... gives the fda a very wide margin of error, even if a compound in the packaging is later found to be a human carcinogen. "additives" that are known carcinogens are completely barred under the delaney amendment. but lono would be available for packaging containing carcinogen "impurities" at a specific threshold level or below."