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40 C.F.R.: Appendix A to Part 355—The List of Extremely Hazardous Substances and Their Threshold Planning Quantities (PDF) (July 1, 2008 ed.), Government Printing Office, archived from the original (PDF) on 2012-02-25
Software that converts text to voice is readily available and can be easily used to read out Wikipedia pages on-the-fly. See screen reader. The web-based Pediaphon service uses speech synthesis to generate MP3 audio files and podcasts of Wikipedia articles in
Chemical safety includes all safety policies, procedures and practices designed to minimize the risk of exposure to potentially hazardous chemicals.This includes the risks of exposure to persons handling the chemicals, to the surrounding environment, and to the communities and ecosystems within that environment. [1]
Many gases have toxic properties, which are often assessed using the LC 50 (median lethal concentration) measure. In the United States, many of these gases have been assigned an NFPA 704 health rating of 4 (may be fatal) or 3 (may cause serious or permanent injury), and/or exposure limits (TLV, TWA/PEL, STEL, or REL) determined by the ACGIH professional association.
Cadmium is a naturally occurring toxic metal with common exposure in industrial workplaces, plant soils, and from smoking. Due to its low permissible exposure in humans, overexposure may occur even in situations where only trace quantities of cadmium are found.
'Lessons in Chemistry,' starring Brie Larson, drops new episodes on Apple TV+ every Friday until the November 24 finale. Here's a look at the release date schedule.
This page lists recordings of Wikipedia articles being read aloud, and the year each recording was made. Articles under each subject heading are listed alphabetically (by surname for people). For help playing Ogg audio, see Help:Media. To request an article to be spoken, see Category:Spoken Wikipedia requests.
Children's literature portal; The Golden Book of Chemistry Experiments is a children's chemistry book written in 1960 by Robert Brent and illustrated by Harry Lazarus and published by Western Publishing as part of their Golden Books series.