Active Standard ASTM D1720 | Developed by Subcommittee: D01.35
Book of Standards Volume: 06.04
Historical (view previous versions of standard)
Significance and Use
4.1 By use of standard or reference grade materials for any two of the three components, namely, oxygenated solvent, diluent, or cellulose nitrate, the effect of different batches or different types of the third component can be determined.
4.2.1 The dilution ratio of toluene as the standard diluent to an oxygenated solvent under test, using as the solute standard cellulose nitrate as defined in 5.2.
4.2.2 The dilution ratio of a hydrocarbon diluent under test to n-butyl acetate as the standard solvent, using as a solute standard cellulose nitrate as defined in 5.2.
1.1 This test method covers the determination of the volume ratio of hydrocarbon diluent to active solvent required to cause persistent heterogeneity (precipitation) in a solution of cellulose nitrate.
1.3 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 off “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 E29.
1.4 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 6.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D301 Test Methods for Soluble Cellulose Nitrate
D841 Specification for Nitration Grade Toluene
D4615 Specification for n-Butyl Acetate (All Grades)
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
ICS Number Code 87.060.30 (Solvents)