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in the Chemical 1ubomtory Edited by NORMAN V. STEERE, 140 Melbourne Ave., S.E. Minneapolis, Minn. 554 14
XC. Identification of Hazardous Materials-Part
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NORMAN V. STEERE I n September, 1971, after Parts I and I1 of this article had been submitted, copies became available of a new Federal St,andard on identification of hazardous chemicals. Adopted on July 23, 1971, the new Federal Standard (No. 313), "Symbols for Packages and Containers far Hezardous Industrial Chemicals and Materials', incorporates the requirements of MILSTD-1341A which has the ssme title and was referred to in Parts I and I1 of this article. All Federal agencies are required t o reference Federal Standard No. 313 for purchases of hazardous materials, and the Standard provides uniform symbols for packages and shipping containers of h a p ardous material shipped to and by Government activities. Details and exceptions will be included later in this article. Copies of Federal Standard No. 313 can he obtained for 8.25 each from General Services Administration, Federal Supply Service, Specificat,ion Sales, Building 197, Washingtan'Navy Yard, Stop 249, Washington, 1). C . 20407.
CORROSIVES, IRRITANTS, A N D SENSITIZERS Corrosives Corrosive materials are defined hy the Department of Transportation, the Federal Hazardous Substances Act, and the Manufacturing Chemists Association. Federal Standard No. 313 and NFPA No. 704M use the term corrosive without giving a definition.
Corrosive liquids are defined by DOT far transportation regulations s s "those acids, alkaline caustic liquids and other corrosive liquids which when in contact with living tissue, will cause severe damage of such tissue, by chemical action; or in case of leakage will mrtterially damage or destroy other freight by chemical action; or are liable to cause fire when in contact with organic matter or with certain chemicals." Some of the chemicals classified as corrosive liquids by I X T are: antimony pentachloride, boron trichloride, bromine, chlorine trifluoride, ehlorosulIonic acid, chromic acid, dimethyl sulfate, hydrohromic acid, hydrochloric acid, hydrafluoric aeid, hydmgen peroxide (52% or more), nitric acid, perchlvric aeid (less than 727,), sulfuric acld, thionyl chloride, tin tetrachloride (anhydrous), and titanium tetrachloride. The Federal Hazardous Substances Act defines the term corrosive as any suhstance "which in contact with living tissue will cause destrnction of tissue by chemical action; but shall not refer to action on inanimate surfsee." Essentially the same definition is given in the MCA "Guide to Precautionary Labeling of Hazardous Chemicals." llegulations adopted under the Federal Hazardous Substances Act (FIISA) in Title 21 of the Code of Federal I
