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Below are the first 10 and last 10 pages of uncorrected machine-read text (when available) of this chapter, followed by the top 30 algorithmically extracted key phrases from the chapter as a whole.
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OCR for page 1
INTRODUCTION
The Committee on Evaluation of Industrial Hazards of
the National Materials Advisory Board was charged with
assigning classifications to certain chemicals of interest
to OSHA according to the classification groups given in
the National Electrical Code, Article 500 (NEC 500~. To
aid in this task the committee also collected physical and
flammability properties of these chemicals and compiled
them into a matrix. This work is an extension of earlier
work done by the NRC Committee on Hazardous Materials in
which flammability properties of chemicals of interest to
the U.S. Coast Guard (USCG) were also studied and classified
according to NEC 500. This current Matrix of Combustion-
Relevant Properties and Classifications of Gases7 Vapors,
and Selected Solids includes materials in the earlier study*
and the list of chemicals submitted by OSHA as published in
the Federal Register, Vol. 39, No. 125, pp. 23541-3 of
27 June 1974, in order to make the Matrix more encompassing
and, therefore, more useful. It includes classifications
assigned by the committee to materials not previously
classified, classifications by the earlier committee (which
have been reviewed and updated), and classifications by the
NEC 500 and/or proposed classifications by Underwriters
Laboratories, Inc.
Names of chemicals as used in this Matrix are taken from
the earlier USCG list and from the list proposed by OSHA
as printed in the Federal Register and are not necessarily
the nomenclature consistent with that recommended by The
International Union of Pure and Applied Chemistry (IUPAC).
Since it has become apparent to the committee that
classifications are closely linked to chemical structure,
the Matrix is presented and cataloged by chemical families.
This should make it easier to classify new materials not
now in the Matrix which become of importance or of interest
and to include them in future matrices. Accordingly, a
summary of tentative classif ications by families is also
1
OCR for page 2
2
included.
The rationale and modus operandi for classifications
of the new chemicals were very similar to those used by the
Panel on Electrical Hazards of the earlier committee, and
the reader is referred to their report for details**.
The Matrix-does not represent an exhaust ive coverage of
the literature, but it is believed that reliable references '
were used in assembling the data.. It must be recognized
that the data presented are for pure materials, and some
properties (such as'flash point) may'd.iffer significantly
from materials of commerce because of differences in
purity.
. Although a few.solids are included in the present matrix,
the classification of dusts in general is the subject of a
separate study and will be reported in a publication to
follow this one.
Matrix of Electrical and Fire Hazard Properties and
Classifications of Chemicals. A report prepared for
the Committee on Hazardous Materials of the National
Research Council by the Electrical Hazards Panel,
Homer W. Carhart, Chairman. National Academy of
Sciences, Washington, DC, 1975. NTIS No. AD/A027181/WK.
** Fire Hazard Classification of Chemical Vapors Relative
to Explosion-Proof Electrical Equipment, Report IV.
A supplementary report prepared by the Electrical
-Hazards Panel of the Committee on Hazardous Materials
of the National Research Council, Homer W. Carhart,
Pane J Chairman, Robert B. Beckman, Chairman. National
Academy of Sciences, Washington, DC, 1975. NTIS No.
AD/PC026215/LG. .
Representative terms from entire chapter:
electrical hazards
