Speed of Sound and Density of Difluoromethane

Speed of sound and density measurements for difluoromethane. Speed of sound was measured in the liquid phase using a dual-path pulse-echo instrument at temperatures between 230 and 345 K, with pressures from 2.1 to 70 MPa. Vapor-phase density was measured using a dual-sinker densimeter instrument at temperatures from 240 to 340 K and pressures from 0.1 to 1.61 MPa.

Data and Resources

Field Value
accessLevel public
accrualPeriodicity irregular
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identifier ark:/88434/mds2-2554
issued 2023-01-04
landingPage https://data.nist.gov/od/id/mds2-2554
language {en}
license https://www.nist.gov/open/license
modified 2022-02-23 00:00:00
programCode {006:045}
publisher National Institute of Standards and Technology
resource-type Dataset
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Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • density
  • dfm
  • hfc-32
  • low-gwp
  • material-property
  • r-32
  • reference-data
  • speed-of-sound
isopen False
license_id other-license-specified
license_title other-license-specified
maintainer Elizabeth Rasmussen
maintainer_email elizabeth.rasmussen@nist.gov
metadata_created 2025-09-24T03:27:39.898010
metadata_modified 2025-09-24T03:27:39.898020
notes Speed of sound and density measurements for difluoromethane. Speed of sound was measured in the liquid phase using a dual-path pulse-echo instrument at temperatures between 230 and 345 K, with pressures from 2.1 to 70 MPa. Vapor-phase density was measured using a dual-sinker densimeter instrument at temperatures from 240 to 340 K and pressures from 0.1 to 1.61 MPa.
num_resources 4
num_tags 16
title Speed of Sound and Density of Difluoromethane