Technical Data Sheet (TDS) · Refrigerant technical reference document
Data version: 2026.09.22 | Generated on: 2026-09-28
Identification
Chemical name
Dichlorofluoromethane (HCFC-21)
Common designations
R21
GWP
151
ODP
0.04
Safety class
B1
Family
HCFC
Regulatory tier
HCFC (Montreal Protocol phase-out)
Basic physical properties
Molecular weight (g/mol)
102.923
Triple point temp. (°C)
-73.150
Critical temp. (°C)
179.570
Critical pressure (MPa, abs)
5.2847
Critical density (g/cm³)
0.5228
Acentric factor
0.2061
Liquid relative density (20/4°C)
1.3795
Vapor relative density (air=1)
3.553
Quality standard
Indicator
Limit
Water
≤10 ppm
Acidity (as HCl)
≤1 ppm (as HCl)
Non-condensable gas
≤1.5 % (v/v, @25°C)
High-boiling residue
≤0.01 %
Particulates (visually clean)
visually clean
Chloride test
pass
Other volatile impurities
≤0.5 %
Per AHRI 700 uniform purity requirements (applies to all refrigerants and blends).
Applications
Refrigerant for legacy A/C and refrigeration equipment; under Montreal Protocol phase-out and limited to servicing existing installations.
Safety & storage
Store in a cool, dry, well-ventilated place away from heat and open flame; keep cylinders upright and secured.
Supplier
Supplier
Wulachem
Contact
sales@wulachem.cn
Disclaimer
The values and limits in this Technical Data Sheet are taken from this site’s refrigerant property database (based on CoolProp reference data and relevant quality standards) and are provided for product selection and technical reference only. Before charging, storage and system integration, always verify against the latest official Safety Data Sheet (SDS) and the manufacturer’s technical documentation, and strictly follow applicable regulations and equipment manufacturer requirements. This site accepts no liability for any decisions or consequences based on this document.