【国外标准】 Standard Test Methods for Hydroxypropyl Methylcellulose

AbstractThese test methods cover the testing of hydroxypropyl methylcellulose. The test methods are as follows: moisture; ash; chlorides; alkalinity; iron; heavy metals; methoxyl content; hydroxyproproxyl content; viscosity; pH; solids; and density.1.1 These test methods cover the testing of hydroxypropyl methylcellulose.1.2 The test procedures appear in the following order:  Sections Moisture 4 to 6Ash (as Sulfate)  7 to 10Chlorides (as NaCl) 11 to 14Alkalinity (as Na2CO3) 15 to 18Iron 19 to 24Heavy Metals 25 to 29Methoxyl Content 30 to 35Hydroxypropoxyl Content 36 to 41Viscosity 42 to 46pH 47Solids 48 to 51Density 52 to 561.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For a specific hazard statement, see 33.5.1.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.