ISO 7579:2009 PDF

Scope: This International Standard specifies two methods for determining the solubility of dyestuffs in organic solvents. They are applicable to dyestuffs that do not change chemically under the influence of the solvent and are stable and non-volatile under the specified drying conditions. For volatile solvents (boiling point < 120 "Cj, the gravimetric procedure is _ recommended and, for less volatile solvents (boiling point > 120"C)， the photometric procedure is _ recommended. The choice of procedure should be made on a case-by-case basis. The methods are suitable for concentrations between 1g and 1000 g of dyestuff per litre of solvent. Higher concentrations can be used provided the viscosity of the solution is such that the procedure can be carried out readily. The methods are not suitable for the determination of insoluble matter in a dyestuff.

ISO 7579:2009 Referenced Document

ISO 15528 Paints, varnishes and raw materials for paints and varnishes — Sampling*， 2020-05-13 Update
ISO 2811-1 Paints and varnishes — Determination of density — Part 1: Pycnometer method*， 2023-01-18 Update
ISO 787-2 General methods of test for pigments and extenders — Part 2: Determination of matter volatile at 105 °C*， 2021-08-02 Update

2009 ISO 7579:2009 Dyestuffs - Determination of solubility in organic solvents - Gravimetric and photometric methods
1990 ISO 7579:1990 Dyestuffs; determination of solubility in organic solvents; gravimetric method