ASTM D3366-95(2003)e1

Standard Test Method for Color of Maleic Anhydride and Phthalic Anhydride in the Molten State and After Heating (Platinum-Cobalt Scale) (Withdrawn 2012)

SIGNIFICANCE AND USE
The color of maleic anhydride and phthalic anhydride can be an indication of the purity of these materials. High colors normally indicate contamination.
SCOPE
1.1 This test method covers the determination of the visual measurement of the color of maleic and phthalic anhydride melt before and after prolonged heating under specified conditions of time and temperature. Color values are expressed in terms of platinum-cobalt standards. This test method covers the range 0 to 100 color standard numbers.
1.2 The following applies to all specified limits in this standard: for purposes of determining conformance with this standard, an observed value or a calculated value shall be rounded of "to the nearest unit" in the last right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E 29.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements see Section 7.
WITHDRAWN RATIONALE
This test method covers the determination of the visual measurement of the color of maleic and phthalic anhydride melt before and after prolonged heating under specified conditions of time and temperature. Color values are expressed in terms of platinum-cobalt standards. This test method covers the range 0 to 100 color standard numbers.
Formerly under the jurisdiction of Committee D16 on Aromatic Hydrocarbons and Related Chemicals, this test method was withdrawn in January 2012 in accordance with section 10.5.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

General Information

• Status: Historical
• Publication Date: 09-Feb-2003
• Withdrawal Date: 05-Jan-2012
• ICS: 71.080.50 - Anhydrides
• Technical Committee: D16 - Aromatic, Industrial, Specialty and Related Chemicals
• Drafting Committee: D16.02 - Oxygenated Aromatics

Relations

• Replaces: ASTM D3366-95 - Standard Test Method for Color of Maleic Anhydride and Phthalic Anhydride in the Molten State and After Heating (Platinum-Cobalt Scale)
• Effective Date: 10-Feb-2003

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
´1
Designation:D3366–95(Reapproved2003)
Standard Test Method for
Color of Maleic Anhydride and Phthalic Anhydride in the
Molten State and After Heating (Platinum-Cobalt Scale)
This standard is issued under the fixed designation D3366; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
´ NOTE—Editorial changes were made throughout in February 2003.
1. Scope 2.2 Other Document:
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
1.1 This test method covers the determination of the visual
1910.1200
measurement of the color of maleic and phthalic anhydride
melt before and after prolonged heating under specified con-
3. Summary of Test Method
ditions of time and temperature. Color values are expressed in
3.1 A freshly melted specimen is filled to mark into a
termsofplatinum-cobaltstandards.Thistestmethodcoversthe
Nessler tube and compared with Platinum-Cobalt color stan-
range 0 to 100 color standard numbers.
dards.
1.2 The following applies to all specified limits in this
3.2 Afterheatingfor2hoursataprescribedtemperature,the
standard: for purposes of determining conformance with this
specimen is again compared to the color standards.
standard, an observed value or a calculated value shall be
rounded of “to the nearest unit” in the last right-hand digit used
4. Significance and Use
in expressing the specification limit, in accordance with the
4.1 The color of maleic anhydride and phthalic anhydride
rounding-off method of Practice E29.
can be an indication of the purity of these materials. High
1.3 This standard does not purport to address all of the
colors normally indicate contamination.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Apparatus
priate safety and health practices and determine the applica-
5.1 Color Comparison Tubes—Matched sets of 50-mL
bility of regulatory limitations prior to use. For specific hazard
Nessler tubes having a total length of about 300 mm. The
statements see Section 7.
height of the 50-mLgradation mark shall be within 200 to 250
mm above the exterior bottom of the tube. In a given set the
2. Referenced Documents
graduation marks shall not vary by more than 3 mm. The use
2.1 ASTM Standards:
of heat resistant glass is required.
D1193 Specification for Reagent Water
5.2 Color Comparator, constructed to permit visual com-
D1209 Test Method for Color of Clear Liquids (Platinum-
parison of light transmitted through the 50-mLNessler tubes in
Cobalt Scale)
thedirectionoftheirlongitudinalaxes.(Thecomparatorshould
D3438 Practice for Sampling and Handling Naphthalene,
be constructed so that white light is reflected off a white plate
Maleic Anhydride, and Phthalic Anhydride
and directed with equal intensity through the tubes, and should
E29 Practice for Using Significant Digits in Test Data to
be shielded so that no light enters the tubes from the side.)
Determine Conformance with Specifications
NOTE 1—Forconvenienceofoperation,anelectricallyheated,insulated
comparator tube may be used to prevent the solidification of maleic or
This test method is under the jurisdiction of ASTM Committee D16 on phthalic anhydride.
Aromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
5.3 Electric Heating Block—An electrically heated alumi-
Subcommittee D16.02 on Oxygenated Aromatics.
Current edition approved Feb. 10, 2003. Published April 2003. Originally num block, such as shown in Fig. 1, having the following
approved in 1974. Last previous edition approved in 1995 as D3366 – 95. DOI:
operating characteristics:
10.1520/D3366-95R03E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
Standards volume information, refer to the standard’s Document Summary page on 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
the ASTM website. www.access.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D3366–95 (2003)
A
TABLE 1 Platinum—Cobalt Color Standards
6.4 Hydrochloric Acid (specific gravity 1.19)—
Color Stock Color Stock Concentrated hydrochloric acid (HCl).
Standard Solution Standard Solution
6.5 Potassium Chloroplatinate—(K PtCl ).
2 6
No. mL No. mL
5 0.5 35 3.5
7. Hazards
10 1.0 40 4.0
15 1.5 50 5.0 7.1 Consult current OSHA regulations, supplier’s Material
20 2.0 60 6.0
Safety Data Sheets, and local regulations for materials used in
25 2.5 70 7.0
this test method.
30 3.0 100 10.0
A
Other color standards may be prepared by proportional dilution in steps of 20
8. Sampling
as follows: No. 120, No. 140, No. 160, etc.
8.1 Sample in accordance with Practice D3438.
9. Standards
9.1 Platinum-Cobalt Stock Solution —Dissolve 1.245 g of
K PtCl and 1.000 g of CoCl ·6H O in water. Add 100 mL of
2 6 2 2
HCl and dilute to 1 L with water. This solution is defined as
color standard No. 500.
9.2 Platinum Cobalt Standards —From the stock solution,
prepare color standards by diluting the required volumes as
given in Table 1, to 50 mL with water in the Nessler tubes.
When not in use, protect these standards from contamination
and evaporation by the use of suitable caps on the tubes.
10. Procedure
10.1 Melt an approximately 75-g specimen (Note 2) and
simultaneously preheat a Nessler tube in an oven, electric
heating block, or other similar equipment held at a temperature
of 60°C for maleic anhydride and 150°C for phthalic anhy-
dride.
FIG. 1 Heat Stability Block
10.2 As soon as the specimen is completely liquid, mix by
stirring with a clean, dry, glass rod; then quickly fill the
Maleic anhydride temperature regulation,° C 140 6 2
preh
...