ASTM D7952-15(R2021) pdf free download

ASTM D7952-15(R2021) pdf free download.Standard Test Method for Measuring Aspiration Potential of Aerosol Products
1. Scope
1.1 This test method covers a small-scale laboratory proce- dure to determine the aspiration potential of aerosol products by determining spray pattern and aerosol deposition rates. 1.2 This test method has been developed to address a need to identify which aerosol products may present an aspiration risk such that special labeling and/or child-resistant packaging would be appropriate. Studies based on this method may allow the development ofa practice to identify such aerosol products. 1.3 Although this method may be useful for testing non- pressurized aerosol products, its development has been limited to testing pressurized aerosols. 1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.5 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.6 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Terminology
2.1 Definitions: 2.1.1 aerosol product, n—a product that dispenses liquid as an aerosol. 2.1.2 ballistic stream (or stream), n—a stream pattern that deposits entirely in the test cup. 2.1.3 cone spray, n—spray pattern where the bottom of the test cup is completely covered during a 5 to 7 s test but a portion ofthe aerosol is deposited outside ofthe cup during the entire test. 2.1.4 deposition rate, n—the amount of aerosol (in grams) that dispenses in a test cup in one second. 2.1.5 mist, n—spray pattern where the aerosol only partially covers the bottom of the test cup during a 5 to 7 s test. 2.1.6 pressurized aerosol product, n—an aerosol product that is self-pressurized and does not require pumping to dispense an aerosol. 2.1.7 spray pattern, n—the pattern in which an aerosol is dispensed and deposited.
3. Summary of Test Method
3.1 After shaking and discarding 5 s worth of spray, the test aerosol is sprayed onto a test cup held in place with sticky wax from an aligning apparatus (see Fig. 1) for 5 to 7 s. The test cup is weighed before the test and within 60 s after concluding the test.
4. Significance and Use
4.1 This test method provides a means of measuring whether or not an aerosol product may present an aspiration risk if a dispensed aerosol gets into one’s mouth. 4.2 The degree of risk for aspiration of an aerosol depends both on spray pattern as well as aerosol deposition rate. 2 4.3 This test method will be used to determine the need for child-resistant packaging of aerosol products.
6. Procedure
6.1 Weigh weighing cup to nearest 0.0001 g and attach to middle of Plexiglas sheet with jeweler’s sticky wax. 6.2 Set aligning apparatus at end of Plexiglas sheet so that vertical is exactly 11 in. (28 cm) from the center ofthe test cup. 6.3 Shake aerosol container according to directions or for 1 min. if directions are not available. 6.4 Spray aiming to hit the middle of the test cup. Continue spraying for 5 to 7 s. Time the actual spraying time precisely with a stop watch. 6.5 Remove the test cup and re-weigh within 60 s. 6.6 Repeat the above sequence for a total of three test runs. After each run, clean Plexiglas surface with VM & P naphtha. 6.7 Record spray pattern and weight of aerosol deposited per run in g/s. 6.8 Conduct spraying at an ambient temperature of 20 6 2 °C in a draft-free room.