Home - PubChem Compound - NCBI. Chemistry Dictionary. From chlorine in chemical works is not infrequent, and is generally caused by the workmen entering the chambers wherein lime has been chlorinated in course of the manufacture of bleachingpowder, before the chlorine gas has been exhausted, and at other times owing to accidental leakages.
It is usual for the workmen to hold rags or a cloth wetted with water or dilute sodium carbonate in their mouths to prevent injury. In the recent war, gassing attacks by means of a chlonne cloud produced by the use of liquefied chlorine were made, and various other substances were used, including cyanogen chloride , chlorinated picric acid and phosgene , xylyl bromide and benzyl bromide, and later, chloromethyl and trichloromethyl chloroformates highly poisonous bodies.
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ChemFeeds - Your Graphical Chemical Abstracts Portal. Chemicalland21.com =Chemical Answer= NIOSH Pocket Guide to Chemical Hazards (NPG) The NIOSH Pocket Guide to Chemical Hazards is intended as a source of general industrial hygiene information on several hundred chemicals/classes for workers, employers, and occupational health professionals.
The NIOSH Pocket Guide does not contain an analysis of all pertinent data, rather it presents key information and data in abbreviated or tabular form for chemicals or substance groupings (e.g. cyanides, fluorides, manganese compounds) that are found in the work environment. The information found in the NIOSH Pocket Guide should help users recognize and control occupational chemical hazards.
Enter search terms separated by spaces. Download the NIOSH Pocket Guide Download the NIOSH Pocket Guide CD-ROM as an ISO image file and create a disc with CD-ROM authoring software. Ordering Information To order free copies of the NIOSH Pocket Guide: Comments We encourage and welcome any comments, suggestions, or corrections that you may have regarding the NIOSH Pocket Guide. Where water meets chemistry™ - Kemira.
Advancing the Chemical Sciences. Molecular Modeling Basics. Matter & Energy. Cell. Welcome to Reactome Pathway Database. Role of Chemistry in History. “Most of us never give a thought to the history or nature of spices or rubber or nicotine or penicillin or a score of other things – chemicals – that have changed the world…” -Oliver Sacks “The idea that momentous events may depend on something as small as a molecule – a group of two or more atoms held together in a definite arrangement – offers a novel approach to understanding the growth of human civilization.
A change as small as the position of a bond – the link between atoms in a molecule – can lead to enormous differences in properties of a substance and in turn can influence the course of history.” -from “Napoleon’s Buttons” Professor Samet’s course, titled Chemistry 111: Role of Chemistry in History, is designed for non-science majors. The focal point of the course is a wonderful book titled “Napoleon’s Buttons: How 17 Molecules Changed History (Penny Le Couteur and Jay Burreson; Penguin Putnam Inc., New York, 2003).”
Column still. Legend: A.
Analyzer B. Rectifier 1. Wash 2. Steam 3. Liquid out 4. A column still, also called a continuous still, patent still or Coffey still, is a variety of still consisting of two columns. History[edit] Sir Anthony Perrier[edit] Sir Anthony Perrier (1770-1845) was operator of the Spring Lane distillery (Glen distillery) in Cork, Ireland from 1806. Robert Stein[edit] In 1828, Perrier's invention inspired a Scotsman, Robert Stein, to create a still that fed the "wash" through a column of partitions. Aeneas Coffey[edit] Chemistry Stack Exchange. The Elements Revealed: An Interactive Periodic Table. In the October 2011 issue of Scientific American, we celebrate the International Year of Chemistry. Learn more about its impact on our daily lives in our Special Report. UPDATED: 06/18/2013 In honor of the 2013 Lindau meeting, which focuses on chemistry, we have updated our interactive periodic table with links to Nature Chemistry's In Your Element essay series.
Each essay tells the story of a particular element, often describing its discovery, history and eventual uses. Main Sources & More to Explore: The Poisoner’s Handbook: Murder and the Birth of Forensic Medicine in Jazz Age New York. Interactive by Krista Fuentes Davide Castelvecchi Davide Castelvecchi is a freelance science writer based in Rome and a contributing editor for Scientific American magazine. Periodic table - chart of all chemical elements. Elements of the Periodic Table. Periodic Table - Interactive Periodic Table of the Elements.
This is an online interactive periodic table of the elements.
Click on an element symbol in the periodic table to get facts for that element. ChemWiki: The Dynamic Chemistry Textbook - ChemWiki. MSDS - Stellite Tips. * OSHA PEL: Occupational Safety & Health Administration Permissible Exposure Limits.
pH Scale. Ionization of Water: Water molecules exist in equilibrium with hydrogen ions and hydroxide ions.
The water equilibrium constant is written as: Kw = [H+] [OH-] Table of contents : Nature Chemical Biology. Mineralogy Database. Skin Deep® Cosmetics Database. Buy Research Chemicals. Chemical Structure H2O. Water Solutions. Water Research. Chemical Structure H2O. Plastikos. PrintTech. Health ReferencEd. SCIENCE.