Generic Maximum Contaminant Levels

Contaminant Reporting units Air and Other Non-condensables 1.5% by volume @ 25 °C (N/A for refrigerants used in low-pressure appliances 1 ). Water 10 ppm by weight 20 ppm by weight (for refrigerants used in low-pressure appliances 1 ). Other Impurities Including Refrigerant 0.50% by weight. High boiling residue 0.01% by volume. Particulates/solids visually clean to pass. Acidity 1.0 ppm by weight. Chlorides (chloride level for pass/fail is 3ppm) No visible turbidity. 1 Low-pressure appliances means an appliance that uses a refrigerant with a liquid phase saturation pressure below 45 psia at 104 °F. Blend Compositions (Where Applicable) Nominal composition (by weight%) Allowable composition (by weight%) Component constitutes 25% or more ±2.0 Component constitutes less than 25% but greater than 10% ±1.0 Component constitutes less than or equal to 10% ±0.5 [69 FR 11988, Mar. 12, 2004]