|C||The paper that is cited here refers to another reference which could not be obtained (e.g., personal communication, Ph.D. theses, internal papers etc.).|
|E||The value is estimated. Estimates are only listed if no reliable measurements are available for the compound.|
|L||The cited paper is a literature review.|
|M||Original publication of a measured value.|
|R||The cited paper presents a recalculation of previously published material (e.g., extrapolation to a different temperature or concentration range).|
|V||Vapor pressure of the pure substance is used to determine the Henry's law constant.|
|X||The information presented comes from another paper or personal communication.|
|Q||The cited paper doesn't clearly state how the value was obtained.|
© 2016 by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved.
Copyright for NIST Standard Reference Data is governed by the Standard Reference Data Act.
If you have comments or questions about this site, please contact us.