2.4.2.2. Requirements for quality of controlled substances after recycling:

2.4.2.2.1. After being recycled, the controlled substances in their pure forms of which the parameters do not exceed the limits specified in Table 2 of this Regulation shall be considered fit for use according to their original characteristics.

Table 2. Parameters for assessment of quality of pure controlled substances

Impurities in the vapor phase

Impurities in the liquid phase

Maximum level of non-condensable gas

Maximum moisture content

Maximum content of other volatile impurities

...

...

...

Particulates/solids

Maximum acid content

Chloride ions

Reference point

% by volume at 25°C

ppm

% by weight

% by volume or % by weight

Pass/Fail

...

...

...

Pass/Fail

PURE HFC SUBSTANCES

R-134

N/A

N/A

N/A

N/A

N/A

N/A

...

...

...

R-134a

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

R-143

...

...

...

N/A

N/A

N/A

N/A

N/A

N/A

...

...

...

R-245fa

N/A

20,0

0,5

0,01

...

...

...

1,0

No turbidity

R-365mfc

N/A

N/A

N/A

N/A

N/A

N/A

...

...

...

R-227ea

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

R-236cb

...

...

...

N/A

N/A

N/A

N/A

N/A

N/A

R-236ea

N/A

N/A

...

...

...

N/A

N/A

N/A

N/A

R-236fa

1,5

10,0

0,5

0,01

...

...

...

1,0

No turbidity

R-245ca

N/A

N/A

N/A

N/A

N/A

N/A

...

...

...

R-43-10mee

N/A

N/A

N/A

N/A

N/A

N/A

N/A

R-32

...

...

...

20,0

0,5

0,01

Visually clean

1,0

No turbidity

R-125

1,5

10,0

...

...

...

0,01

Visually clean

1,0

No turbidity

R-143a

1,5

10,0

0,5

0,01

...

...

...

1,0

No turbidity

R-41

N/A

N/A

N/A

N/A

N/A

N/A

...

...

...

R-152

N/A

N/A

N/A

N/A

N/A

N/A

N/A

R-152a

...

...

...

10,0

0,5

0,01

Visually clean

1,0

No turbidity

R-23

1,5

10,0

...

...

...

0,01

Visually clean

1,0

No turbidity

OTHERS

R-21

N/A

N/A

N/A

...

...

...

N/A

N/A

N/A

R-22

1,5

10,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-31

N/A

N/A

N/A

N/A

N/A

N/A

N/A

...

...

...

1,5

10,0

0,5

0,01

Visually clean

1,0

Visually clean

R-121

N/A

...

...

...

N/A

N/A

N/A

N/A

N/A

R-122

N/A

N/A

N/A

...

...

...

N/A

N/A

N/A

R-123

N/A2

20,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-124

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

N/A

N/A

N/A

N/A

N/A

N/A

N/A

R-142

N/A

...

...

...

N/A

N/A

N/A

N/A

N/A

R-142b

2,0

15,0

0,5

...

...

...

Visually clean

1,0

No turbidity

R-218

1,5

10,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-225

N/A

N/A

N/A

N/A

N/A

N/A

N/A

...

...

...

N/A

N/A

N/A

N/A

N/A

N/A

N/A

R-225cb

N/A

...

...

...

N/A

N/A

N/A

N/A

N/A

R1234yf

1,5

10,0

0,9

...

...

...

Visually clean

1,0

No turbidity

R-1234ze(E)

1,5

10,0

0,5

0,01

Visually clean

...

...

...

No turbidity

Note: 1. Chloride ions, pass/fail, about 3 ppm.

2. N/A = Not applicable

2.4.2.2.2. After being recycled, the controlled substances in their pure forms of which the parameters do not exceed the limits specified in Table 3 of this Regulation shall be considered fit for use according to their original characteristics.

Table 3. Parameters for assessment of quality of controlled substances that are zeotropes

Impurities in the vapor phase

Impurities in the liquid phase

Maximum level of non-condensable gas

...

...

...

Maximum content of other volatile impurities

High boiling residue

Particulates/solids

Maximum acid content

Chloride ions

Reference point

% by volume at 25°C

ppm

% by weight

...

...

...

Pass/Fail

ppm (calculated as HCl)

Pass/Fail

R-401A

1,5

10,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-401B

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

R-406A

1,5

...

...

...

0,5

0,01

Visually clean

1,0

Visually clean

R-407A

1,5

10,0

0,5

...

...

...

Visually clean

1,0

Visually clean

R-407C

1,5

10,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-407F

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

R-408A

1,5

...

...

...

0,5

0,01

Visually clean

1,0

No turbidity

R-409A

1,5

10,0

0,5

...

...

...

Visually clean

1,0

No turbidity

R-410A

1,5

20,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-415B

1,5

10,0

0,5

0,01

Visually clean

1,0

Visually clean

...

...

...

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

R-422A

1,5

...

...

...

0,5

0,01

Visually clean

1,0

No turbidity

R-422D

1,5

10,0

0,5

...

...

...

Visually clean

1,0

No turbidity

R-427A

1,5

10,0

0,5

0,01

Visually clean

...

...

...

Visually clean

R-438A

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

R-449A

1,5

...

...

...

0,5

0,01

Visually clean

1,0

Visually clean

R-450A

1,5

10,0

0,5

...

...

...

Visually clean

1,0

No turbidity

R-452A

1,5

10,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-452B

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

R-454B

1,5

...

...

...

0,5

0,01

Visually clean

1,0

No turbidity

R-454C

1,5

10,0

0,5

...

...

...

Visually clean

1,0

No turbidity

R-466A

N/A

N/A

N/A

N/A

N/A

...

...

...

N/A

R-402B

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

R-403B

1,5

...

...

...

0,5

0,01

Visually clean

1,0

No turbidity

R-409B

1,5

10,0

0,5

...

...

...

Visually clean

1,0

No turbidity

R-411A

1,5

10,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-412A

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

1,5

10,0

0,5

0,01

Visually clean

1,0

Visually clean

R-416A

1,5

...

...

...

0,5

0,01

Visually clean

1,0

No turbidity

R-418A

1,5

10,0

0,5

...

...

...

Visually clean

1,0

No turbidity

R-420A

1,5

10,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-407B

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

1,5

20,0

0,5

0,01

Visually clean

1,0

No turbidity

R-421A

1,5

...

...

...

0,5

0,01

Visually clean

1,0

No turbidity

R-421B

1,5

10,0

0,5

...

...

...

Visually clean

1,0

No turbidity

R-422B

1,5

10,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-422C

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

R-424A

1,5

...

...

...

0,5

0,01

Visually clean

1,0

No turbidity

R-425A

1,5

10,0

0,5

...

...

...

Visually clean

1,0

No turbidity

R-426A

1,5

10,0

0,5

0,01

Visually clean

...

...

...

Visually clean

R-428A

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

R-405A

1,5

...

...

...

0,5

0,01

Visually clean

1,0

No turbidity

R-410B

1,5

10,0

0,5

...

...

...

Visually clean

1,0

No turbidity

R-411B

1,5

10,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-413A

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

R-414B

1,5

...

...

...

0,5

0,01

Visually clean

1,0

No turbidity

R-422E

1,5

10,0

0,5

...

...

...

Visually clean

1,0

No turbidity

R-442A

1,5

10,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-444A

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

R-445A

1,5

...

...

...

0,5

0,01

Visually clean

1,0

No turbidity

R-446A

1,5

10,0

0,5

...

...

...

Visually clean

1,0

No turbidity

R-447A

1,5

10,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-447B

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

1,5

10,0

0,5

0,01

Visually clean

1,0

Visually clean

R-453A

1,5

...

...

...

0,5

0,01

Visually clean

1,0

No turbidity

R-455A

1,5

10,0

0,5

...

...

...

Visually clean

1,0

No turbidity

R-456

1,5

10,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-457A

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

2. N/A = Not applicable

2.4.2.2.3. After being recycled, the controlled substances in their pure forms of which the parameters do not exceed the limits specified in Table 4 of this Regulation shall be considered fit for use according to their original characteristics.

Table 4. Parameters for assessment of quality of controlled substances that are azeotropes

Impurities in the vapor phase

Impurities in the liquid phase

Maximum level of non-condensable gas

Maximum moisture content

Maximum content of other volatile impurities

...

...

...

Particulates/solids

Maximum acid content

Chloride ions

Reference point

% by volume at 25°C

ppm

% by weight

% by volume or % by weight

Pass/Fail

...

...

...

Pass/Fail

R-507A

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

R-513A

1,5

...

...

...

0,5

0,01

Visually clean

1,0

No turbidity

R-513B

1,5

10,0

0,5

...

...

...

Visually clean

1,0

No turbidity

R-509A

1,5

10,0

0,5

0,01

Visually clean

...

...

...

No turbidity

R-508A

1,5

10,0

0,5

0,01

Visually clean

1,0

No turbidity

...

...

...

1,5

20,0

0,5

0,01

Visually clean

1,0

No turbidity

R-515A

1,5

...

...

...

0,5

0,01

Visually clean

1,0

No turbidity

R-516A

1,5

10,0

0,5

...

...

...

Visually clean

1,0

No turbidity

Note: Chloride ions, pass/fail, about 3 ppm.

2.4.3. Requirements for recycled controlled substances:

2.4.3.1. Recycled controlled substances must satisfy the quality requirements prescribed in 2.4.2.2 of this Regulation.

2.4.3.2. Recycled controlled substances must be stored in recovery containers as prescribed in 2.1.2.2 of this Regulation, except for the assignment of recovery container colors according to AHRI Guideline N 2017: Assignment of Refrigerant Container Colors; labeled, indicating “[Số hiệu môi chất lạnh] tái chế” (“[refrigerant number] recycled”), hazard and warnings (if applicable). Information on the label must be distinct and insusceptible to blurring and fading.

2.4.2.2.1. Recycled controlled substances of which the parameters fail to satisfy the quality requirements set out in 2.4.2.2 of this Regulation shall be handled as prescribed in 2.6 of this Regulation.

2.4.4. A logbook that records controlled substance recycling activities shall be kept, containing at least the following information: refrigerant number; weight or volume of controlled substances, time of recycling, weight or volume of controlled substances before and after recycling.

...

...

...

2.5.1. The reuse of controlled substances is applicable to organizations and establishments possessing equipment containing controlled substances specified in point c clause 1 Article 17 of the Circular No. 01/2022/TT-BTNMT.

2.5.1. The organizations and establishments mentioned in 2.5.1 of this Regulation shall use on-site rapid measuring instruments to decide to reuse controlled substances in equipment owned by such organizations and establishments.

2.5.3. In case it is necessary to clean controlled substances on site, organizations and establishments shall employ purely mechanical and physical-technical measures and filters to remove oil, water, non-condensable gases, volatile impurities and particulates/solids from controlled substances.

2.5.4. A logbook that records controlled substance reuse activities shall be kept, containing at least the following information: refrigerant number; weight or volume of controlled substances, time of reuse, weight or volume of reused controlled substances.

2.6. Regulations on handling of controlled substances

2.6.1. The handling of controlled substances shall comply with regulations of law on management of hazardous waste.

2.6.2. Requirements for technology for handling of controlled substances:

2.6.2.1. Comply requirements for technology for handling of hazardous waste shall comply with regulations of law on environmental protection.

2.6.2.2. Encourage the application of eco- and climate-friendly technology.

...

...

...

3.1. Regulations on conformity regarding collection, transportation and storage of controlled substances

3.1.1. Certification of conformity regarding collection, transportation and storage of controlled substances shall comply with method 6 (Assessing and supervising the management system) prescribed in the Circular No. 28/2012/TT-BKHCN dated December 12, 2012 of the Minister of Science and Technology on declaration of standard conformity and technical-regulation conformity and methods for assessment of conformity with standards and technical regulations (hereinafter referred to as “the Circular No. 28/2012/TT-BKHCN”) and Circular No. 02/2017/TT- BKHCN dated March 31, 2017 of the Minister of Science and Technology on amendments to some Articles of the Circular No. 28/2012/TT-BKHCN (hereinafter referred to as “the Circular No. 02/2017/TT-BKHCN”).

3.1.2. According to results of conformity assessment regarding collection, transportation and storage of controlled substances, organizations and establishments shall declare conformity according to this Regulation and other relevant regulations of law.

3.2. Regulations on conformity of recycled controlled substances

3.2.1. Certification of conformity of recycled controlled substances shall comply with method 5 or method 7 in accordance with the Circular No. 28/2012/TT-BKHCN and Circular No. 02/2017/TT-BKHCN:

3.2.1.1. Method 5 (Testing representative sample and assessing the manufacturing process; carrying out supervision by testing the sample collected from the manufacturing location or on the market in association with assessment of the manufacturing process) shall apply in case the manufacturing process of the recycling and production establishment remains stable and continuous.

3.2.1.2. Method 7 (Testing representative samples and assessing conformity of a batch/lot) shall apply in case the manufacturing process of the recycling and production establishment is discontinuous or the recycling and production is only carried out for each product batch and the manufacturing process is only controlled for each product batch or in case the manufacturing process is in progress and is not completely stable in the initial stage of production.

3.2.2. Organizations and establishments shall declare conformity of recycled controlled substances according to this Regulation and other relevant regulations of law.

3.2.3. The declaration of conformity shall rely on the certification results given by a certification body having registered its conformity services in accordance with regulations of law on standard and regulation conformity and method for assessing conformity with standards and technical regulations.

...

...

...

The Ministry of Natural Resources and Environment and People’s Committees of provinces and central-affiliated cities shall disseminate and provide guidelines on application of this Regulation to relevant entities; carry out inspection and audit and impose penalties for violations that arise from the compliance with this Regulation as prescribed by law.