Chemical Management Section
Air Quality Training Center Bldg., DENR Compound
Visayas Ave., Diliman, Quezon City

TeleFax: (032) 928-8892

The Philippine Priority Chemicals List (PCL) is a list of existing and new chemicals that DENR-EMB has determined to a potentially pose unreasonable risk to public health, workplace, and the environment. Among the chemicals in PCL, DENR-EMB determines which chemicals should be regulated. In addition, DENR-EMB imposes special reporting requirements that apply only to chemicals included in PCL. This is an essential aspect of the PCL process since these reports will enable DENR-EMB to obtain the necessary information concerning the priority chemicals and their uses. Such information will assist DENR-EMB in making informed decisions on which chemicals should be regulated.

Assessment of the potential hazards and risks posed by each chemical in PCL is not an easy process. It not only requires knowledge of the toxicity of a substance, but also other characteristics of a substance that may influence the severity and duration of adverse impacts. These include a chemical’s persistence and tendency to bioaccumulate through the food chain. The following criteria has been established by DENR-EMB for PCL based on the selection criteria and used in other industrial nations such as Australia, Japan, Canada and the United States. In addition, qualitative and quantitative information that is unique to the Philippines such as chemical’s use and management, production quantity, percentage of release, occupational exposure, disposal methods, and technical and economic feasibility of its regulation are considered:

Persistence refers to the property of a substance whose half-life in water, sediment, soil, or air exceeds duration of fifty (50) days. Sludge may be used as a surrogate for sediment. Metals are considered to be persistent in all media.

Toxicity refers to the quality of a substance which meets any of the following criteria:

  • Acute lethality
  • Chronic or sub-lethal toxicity
  • Teratogenicity
  • Carcinogenicity


Bioaccumulation potential is the measure of a substance’s ability to bioaccumulate in the food chain.

Requirements in Compliance with the PCL Rules

  1. Duly filled-up Application Form.
  2. Completed/filled-up and duly notarized Annual Report Form of the Applicant. The template may be downloaded from the EMB website @
  3. Summary of the previous year’s Importation, Handling/Transport, Distribution, Storage, Use and Waste Disposal Data for the regulated PCL chemical(s) of the Applicant.
  4. DENR-EMB Identification Number as Hazardous Waste Generator issued to the Applicant by the EMB-Regional Office where the storage facility is located.
  5. Environmental Compliance Certificate (ECC)/Certificate of Non-Coverage (CNC) granted to the Applicant by the EMB-Regional Office EIA System (PD 1586).
  6. Flow Diagram of Activities and Operations and/or its processes involving the regulated PCL chemical(s) of the importer-distributor and user-manufacturer which shows the entry of such chemical(s) and the potential or possible discharge and emission there from of generated toxic and hazardous wastes, if any.
  7. Material Safety Data Sheet (MSDS) of the regulated PCL chemical(s)
  8. Proof of Applicant’s basic awareness and knowledge on the risks and hazard potentials involved in the handling/transport, storage, use, manufacture and/or disposal of generated wastes of the regulated PCL chemicals either through Training Modules or any Training Certifications.
  9. Discharge Permit (if necessary)
  10. Permit to Operate for Air Pollution Control Device (ACD) and Air Pollution Source Installation (APSI) if necessary)
  11. List of users/clients of the regulated PCL chemicals for importer/distributor.
  12. Chemical Management Plan
  13. Contingency and Emergency Plan
  14. Monitoring Results for groundwater and surface water of discharge (effluent) and emission with respect to the potential contamination of the involved PCL chemical(s), or alternatively for gaseous/vapor emission the OSH Center-issued Certification for its conformance to the requirements for safe work place conditions shall be submitted to support the application.
  15. Photos of Storage Facility
  16. Processing Fee (P500.00/chemical)

Philippine Priority Chemical List

CAS Registry No.                Chemical Name

108-90-7                               1,4-CHLOROBENZENE

106-93-4                               1,2-DIBROMOETHANE

95-50-1                                 0-DICHLOROBENZENE

106-46-7                               1,4-DICHLOROBENZENE

107-06-2                               1,2-DICHLOROETHANE

122-66-7                               1,2 DIPHENYLHYDRAZINE

108-46-3                               3-HYDROXYPHENOL 

7647-18-9                             ANTIMONY PENTACHLORIDE

7440-38-2                             ARSENIC COMPOUNDS

1332-21-4                             ASBESTOS*

71-43-2                                 BENZENE

7440-41-7                             BERYLLIUM COMPOUNDS

7440-43-9                             CADMIUM COMPOUNDS

56-23-5                                 CARBON TETRACHLORIDE*



67-66-3                                CHLOROFORM 

76-06-2                                CHLOROPICRIN 

18540-29-9                           CHROMIUM COMPOUNDS

57-12-5                                CYANIDE COMPOUNDS*

64-67-5                                DIETHYL SULFATE

106-93-4                              ETHYLENE DIBROMIDE

75-21-8                                ETHYLENE OXIDE 

111-30-8                              GLUTARALDEHYDE

50-00-0                                FORMALDEHYDE

9002-83-9                            HALONS*

118-74-1                              HEXACHLOROBENZENE

67-72-1                                HEXACHLOROETHANE 

302-01-2                              HYDRAZINE

7439-92-1                            LEAD COMPOUNDS 

149-30-4                              MBT

594-42-3                              MERCAFTAN


7439-97-6                            MERCURY COMPOUNDS 

74-87-3                                METHYL CHLORIDE

75-09-2                                METHYLENECHLORIDE

2385-85-5                            MIREX

87-86-5                                PENTACHLOROPHENOL

127-18-4                              PERCHLROETHYLENE

108-95-2                              PHENIC ACID 

75-44-5                                PHOSGENE 

85-44-9                                PHTHALIC ANHYDRIDE

59536-65- 1                          POLYBROMINATED BIPHENYLS

1336-36-3                             POLYCHLORINATED BIPHENYLS

                                            1,1,1 -TRICHLOROETHANE**

79-01-6                                 TRICHLOROETHYLENE 


7782-49-2                             SELENIUM

75-01-4                                 VINYL CHLORIDE