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| HDPE (High Density Polyethylene) |
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| Also referred to as PE. It comes in the form of high density PE (HDPE) or low density PE (LDPE). Examples of HDPE are milk and detergent bottles. LDPE may be found in the form of bags, film or wrapping. | | HEPA (High Efficiency Particulate Arresting) |
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| HEPA (High Efficiency Particulate Arresting) air filters retain particles to 0.3 microns and are 99.97% efficient. Filtered particles include pollen, mold spores, bacteria, smoke particulates, animal hair and dander, dust, and dust mites. | | hydrochloric acid |
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| See Chlorine. | | hypoallergenic |
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| This is term used to refer to personal care products that do not contain the allergens that most frequently cause allergic reactions. The terms means that a product is less likely to cause a reaction than some other products. |
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