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General Information
- General Information
  - General Information Data Description
    - AJCSD_ID C004-757-45A CAS RN 75-43-4
      
      Chemical Substance Name Dichloro(fluoro)methane
      
      Molecular Formula CHCl2F
      
      Molecular Weight 103
      
      SMILES FC(Cl)Cl
      
      Structure
- Synonym
  - Synonym Data Description
    - Synonym Dichlorofluoromethane
      
      Fluorocarbon 21
      
      Fluorodichloromethane
      
      HCFC 21

Laws and Regulations

Japan

Act on the Evaluation of Chemical Substances and Regulation of Their Manufacture, etc. (Chemical Substances Control Law ; CSCL)

Japan CSCL: Existing Chemical Substances Data Description Definition of the terms of Section 6 [PDF] Definition of the terms of Section 7 [PDF] Import Clearance Procedures[PDF] Notification of the Manufacturing Amount, etc[PDF]

MITI Number	2-92	Category	Section 2
Chemical Substance Name	Dichlorofluoromethane
Remarks	-
Details	to J-CHECK
Remarks to Existing Chemical Substances of Industrial Safety and Health Act	Chemicals have been notified in accordance with the provisions of Chemical Substances Control Law by June 29, 1979
Details to Existing Chemical Substances of Industrial Safety and Health Act	to MHLW site (in Japanese)

Act on Confirmation, etc. of Release Amounts of Specific Chemical Substances in the Environment and Promotion of Improvements to the Management Thereof(PRTR-SDS Law)
- Japan: PRTR-SDS Law (until March 2023) Data Description Outline PRTR Law (METI site) Analysis of PRTR data
  - Classification I Cabinet Order Number
    1-177
    
    Cabinet Order Name Dichlorofluoromethane (synonym: HCFC-21)
    
    Remarks -
    
    Basis of selection Hazard Data (in Japanese)
- Japan: PRTR-SDS Law (from April 2023) Data Description Outline PRTR Law (METI site)
  - JPSN(Japan PRTR-SDS Number)
    177
    Classification I Cabinet Order Number 1-204
    
    Cabinet Order Name Dichlorofluoromethane (synonym: HCFC-21)
    
    Remarks -
    
    Basis of selection Hazard Data (in Japanese)

Industrial Safety and Health Act (ISHA)

Japan ISHA: Chemical Substances Requiring Labeling and Delivery of Documents, etc. Data Description GHS compatible model label creation method (MH LW site : in Japanese) Risk assessment implementation support tool (MHLW site : in Japanese) Target substances list (MHLW site: in Japanese) Responsibilities of Business Operators (JNIOSH site: in Japanese)

Cabinet Order Number	Attached table 2-839 of Ordinance	Implementation	Effective April 1, 2025
Cabinet Order Name	Dichlorofluoromethane (synonym: HCFC-21)
Range of Application for Label (weight%)	>=1
Range of Application for SDS (weight%)	>=0.1

Japan ISHA: Concentration standards for the prevention of health problems caused by chemical substances (Concentration standard value setting substance) Data Description Target substances list(MHLW site: in japanese) Responsibilities of Business Operators (JNIOSH site: in Japanese)

Kinds of substances(Substance name)	Dichlorofluoromethane (synonym: HCFC-21)
Eight-hour concentration standard value	10ppm
Sampling Method	Solid adsorption method
Analytical Method	Gaschromatography
Implementation	2025/10/01

Act on the Protection of the Ozone Layer through the Control of Specified Substances and Other Measures

Japan Act on the Protection of the Ozone Layer through the Control of Specified Substances and Other Measures Data Description Protect the ozone layer Prevent global warming [PDF] To UNEP site

Category	Specified Substances	Cabinet Order Number (Type of Substances)	Attached Table 1-6-1 (C-I)
Cabinet Order Name	Dichlorofluoromethane (HCFC-21)
Potential value	0.04 (Ozone-Depleting Potential)

High Pressure Gas Safety Act

High Pressure Gas Safety Act Data Description

Classification	Class 1 Gas	Applicable provisions of Laws and Regulations, etc.	Cabinet Order 2(3)(iv)
Name in Laws and Regulations, etc.	Fluorocarbons (limited to those conforming to the flammability standards specified by the Ordinance of the Ministry of Economy, Trade and Industry as having flame retardant properties)

High Pressure Gas Safety Act : Regulation on Safety of General High Pressure Gas Data Description
- Classification Inactive Gas Applicable provisions of Laws and Regulations, etc.
  Ministerial Order 2(1)(iv)
  
  Name in Laws and Regulations, etc. Fluorocarbons(except flammable gas)

High Pressure Gas Safety Act : Regulation on Safety of Refrigeration Data Description

Classification	Inactive gas	Applicable provisions of Laws and Regulations, etc.	Ministerial Order 2(1)(iii)
Name in Laws and Regulations, etc.	Fluorocarbons (Excluding Flammable Gases)
Remarks	R-21

Classification	Refrigerant gas	Applicable provisions of Laws and Regulations, etc.	Ministerial Order 5(1)(iv)
Name in Laws and Regulations, etc.	Liquefied Fluorocarbon 21 (HFC-21)
Remarks	R-21

Malaysia
- Use and Standards of Exposure of Chemicals Hazardous to Health (USECHH) Regulation 2000
  - Malaysia: Use and Standards of Exposure of Chemicals Hazardous to Health (USECHH) Regulation 2000 Data Description
    - Category Schedule I
      
      Substance name in English Dichlorofluoromethane
      
      Substance name in local language -

Philippines
- Toxic Substances and Hazardous and Nuclear Wastes Control Act
  - the Philippines: Toxic Substances and Hazardous and Nuclear Wastes Control Act (RA6969) Data Description
    - Category Chemical Control Order for Ozone Depleting Substances
      
      Substance name in English Dichlorofluoromethane
      
      Substance name in local language -
      
      Related Decree -
      
      Category PICCS
      
      Substance name in English DICHLOROMONOFLUOROMETHANE
      
      Substance name in local language -
      
      Related Decree -
      
      Category PICCS
      
      Substance name in English METHANE, DICHLOROFLUORO-
      
      Substance name in local language -
      
      Related Decree -

World Customs Organization

International Convention on the Commodity Description and Coding Systems (HS Convention)

HS Code: Section VI “Products of the Chemical or Allied Industries" Data Description

Chapter	29	Chapter name	Organic chemicals
Heading	2903	Substance name (Heading)	Halogenated derivatives of hydrocarbons
HS Code	2903.79	Substance Name	Halogenated derivatives of acyclic hydrocarbons containing two or more different halogens : Other

Chemical Hazard and Risk Information
- Japan
  - GHS Classification Results by the Japanese Government
    - NITE Japan-GHS Data Description GHS information
      - Edition version_1
        
        Chemical Substance Name dichlorofluoromethane
        
        Classification Result To the result webpage To the Excel flie
    - GHS Classification Results by the Japanese Government Data Description GHS Information
      - Year of implementation /renewal 2006 ID 135_H18_new
        
        Chemical Substance Name dichlorofluoromethane
        
        Classification Result To the resut webpage To the Excel flie

AJCSD_ID	C004-757-45A	CAS RN	75-43-4
Chemical Substance Name	Dichloro(fluoro)methane
Molecular Formula	CHCl2F
Molecular Weight	103
SMILES	FC(Cl)Cl
Structure

Synonym	Dichlorofluoromethane
	Fluorocarbon 21
	Fluorodichloromethane
	HCFC 21

Classification	I	Cabinet Order Number	1-177
Cabinet Order Name	Dichlorofluoromethane (synonym: HCFC-21)
Remarks	-
Basis of selection	Hazard Data (in Japanese)

JPSN(Japan PRTR-SDS Number)	177	Classification	I	Cabinet Order Number	1-204
Cabinet Order Name	Dichlorofluoromethane (synonym: HCFC-21)
Remarks	-
Basis of selection	Hazard Data (in Japanese)

Category	Schedule I
Substance name in English	Dichlorofluoromethane
Substance name in local language	-

Category	Chemical Control Order for Ozone Depleting Substances
Substance name in English	Dichlorofluoromethane
Substance name in local language	-
Related Decree	-

Category	PICCS
Substance name in English	DICHLOROMONOFLUOROMETHANE
Substance name in local language	-
Related Decree	-

Edition	version_1
Chemical Substance Name	dichlorofluoromethane
Classification Result	To the result webpage To the Excel flie

Year of implementation /renewal	2006	ID	135_H18_new
Chemical Substance Name	dichlorofluoromethane
Classification Result	To the resut webpage To the Excel flie