United States       Prevention, Pesticides     EPA712-C-96-019
          Environmental Protection    and Toxic Substances     August 1996
          Agency         (7101)
&EPA   Product Properties
          Test Guidelines
          OPPTS 830.6302
          Color

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                           INTRODUCTION
     This guideline is one  of a series  of test guidelines  that have been
developed by the Office of Prevention, Pesticides and Toxic Substances,
United States Environmental Protection Agency for use in the testing  of
pesticides and toxic substances, and the  development of test data that must
be submitted to the Agency  for review under Federal regulations.

     The Office of Prevention, Pesticides and Toxic Substances (OPPTS)
has  developed this guideline through  a  process of harmonization that
blended the testing  guidance and requirements that existed in the Office
of Pollution Prevention and Toxics  (OPPT) and appeared in Title 40,
Chapter I,  Subchapter R of the Code of Federal Regulations  (CFR), the
Office of Pesticide Programs (OPP) which appeared in publications of the
National Technical  Information Service (NTIS) and  the guidelines pub-
lished by the Organization  for Economic Cooperation and Development
(OECD).

     The purpose of harmonizing these guidelines into a single set  of
OPPTS  guidelines is to minimize variations among the testing procedures
that must be performed to meet the data  requirements of the U. S. Environ-
mental Protection Agency  under the Toxic  Substances Control Act (15
U.S.C. 2601) and the Federal Insecticide,  Fungicide and Rodenticide Act
(7U.S.C. I36,etseq.).

     Final  Guideline Release: This document is available from the U.S.
Government Printing Office, Washington, DC 20402 on The Federal Bul-
letin  Board.   By  modem  dial   202-512-1387,   telnet   and  ftp:
fedbbs.access.gpo.gov     (IP     162.140.64.19),    internet:     http://
fedbbs.access.gpo.gov, or call 202-512-0132 for disks or paper copies.
This guideline is available in ASCII and PDF (portable document format)
from the EPA Public Access Gopher (gopher.epa.gov) under the heading
"Environmental Test Methods and Guidelines."

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OPPTS 830.6302  Color.
     (a) Scope—(1) Applicability. This guideline is intended to meet test-
ing requirements of the  Federal Insecticide,  Fungicide, and  Rodenticide
Act (FIFRA) (7 U.S.C. 136, et seq.).

     (2) Background. The source material used in developing this har-
monized OPPTS test guideline is OPP guideline 63-2 Color (Pesticide As-
sessment Guidelines, Subdivision D: Product Chemistry, EPA Report 5407
9-82-018,  October  1982) and 40 CFR  158.190 Physical and  chemical
characteristics.

     (b) Test method—(1) Objective. Data on the physical and chemical
characteristics of pesticide active ingredients and products are used to con-
firm or provide supportive information on their identity.  Such data are
also  used in reviewing  the  production or formulating process used  to
produce the pesticide or product. Color, physical state, and odor are needed
for the Agency to respond to emergency requests for identification  of
unlabeled pesticides  involved in accidents or spills. Physicians, hospitals,
and  poison  control centers also request this information  to  aid in  their
identification of materials implicated in poisoning episodes.

     (2) Test details, (i) A visual description of the color (or lack of color)
of each opaque  substance may be reported qualitatively.

     (ii) The Munsell color system described in ASTM "Standard Method
of Specifying Color  by the Munsell  System,  D-1535" may be used (see
paragraph (d)(l) of this guideline). This system is based on the color-per-
ception attributes hue, lightness, and chroma and offers a systematic visual
method for solids (opaque substances) viewed in daylight  by an observer
with normal color vision.

     (A) Test procedure. Using the Munsell Book of Color and special
Gray Masks (supplied by the manufacturer) and daylight  illuminating
equipment, the observer visually  compares the test  sample to Munsell
chips or charts  to  estimate from numbers  assigned  to the  chips/charts, in
the following order, the Munsell value, the chroma, and the hue. The chips
or charts are then rearranged and the  estimation is repeated and the values
of the two trials are averaged. By use of special tables, a notation is devel-
oped which reports the determined Munsell  hue, value, and chroma. De-
tailed procedures and explanations of the  tables are presented in ASTM
D-1535.

     (B) [Reserved]

     (iii) The Gardner Color scale described in ASTM D-1544, "Standard
Test Method for Color of Transparent Liquids (Gardner Color Scale)" may
also  be used (see paragraph (d)(2) of this guideline). The method is based
on the comparison of samples of the test substance against color reference
standards.

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     (A)  Test procedure. Glass tubes (such as  viscosity tubes) are filled
with the  test substance and compared with similar tubes containing ref-
erence solutions corresponding to the Gardner Color  Standard  Number.
The  tubes are viewed under defined conditions for illumination source,
surrounding field, and field of view described in the ASTM method. The
method has  18 standard color solutions and provision is made  for more
precise measurements by interpolation between the standard values.

     (B) [Reserved]

     (iv)  If an alternative method is used, it is recommended that the reg-
istrant consult with the Agency prior to adopting the test method.

     (c) Reporting.  (1) Qualitative terms, such as those listed  in  the
"Handbook of Chemistry and Physics," may be used; or color may be
reported by  the Munsell or Gardnel  color systems (see paragraphs (d)(3)
and (d)(4) of this guideline).

     (2) Any methods used to characterize the physical properties of  a
pesticide shall be referenced or described in the application for registration.
If the methods used are listed in paragraph (d) of this guideline, reference
to the method will suffice. If other methods are used, copies of such meth-
ods must be submitted with the application.

     (3) References that denote  "ASTM"  refer to  standardized methods
published by the American Society for Testing and Materials, Philadelphia,
PA.

     (4) The applicant shall submit his own statistical  evaluation of the
precision and accuracy of these measurements (e.g., standard deviations
or confidence intervals) when appropriate.

     (d) References. The following references should be consulted for ad-
ditional background material on this test guideline.

     (1) American Society for Testing and Materials, "Standard Method
of Specifying Color  by the Munsell System, D-1535," ASTM,  Philadel-
phia, PA, 1994 annual index.

     (2) American  Society  for  Testing  and Materials,  "Standard Test
Method for Color of Transparent Liquids (Gardner Color Scale), D-1544,"
ASTM, Philadelphia, PA, 1994 annual index.

     (3) Handbook of Chemistry and Physics, CRC Publishing Co., Boca
Raton, FL, latest edition.

     (4) Information on the Munsell color  system may be obtained from
Munsell Color, MacBeth Color and  Photometry (division of Kollmorgen
Corp.), 2441 N. Calvert St., Baltimore, MD 21218.

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