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BIS Certification for Terephthalic Acid: An Extensive Outlook

calendar31 May, 2023
timeReading Time: 3 Minutes
BIS Certification for Terephthalic Acid: An Extensive Outlook

Terephthalic acid is a chemical compound that is made from para-xylene, which comes from petroleum. It is used to make a type of plastic called polyethylene terephthalate (PET), which is used in many things like clothing, food containers, and packaging materials. Terephthalic acid is also used to make polyester resins that are used in coatings, adhesives, and composite materials. Terephthalic acid falls under the Conformity Assessment Scheme of BIS, which means its manufacturers must have a BIS license. Without this registration, the production of such a chemical is not possible. Let’s take a closer at the legalities around the BIS certification for Terephthalic acid.

Highlighting the Key Requirements under the IS15030:2001

The Indian Standard IS15030:2001 pertains to Terephthalic Acid, which is produced by oxidizing para-xylene. It is also referred to as para phthalic acid, 1, 4 benzene dicarboxylic acid, or benzene para dicarboxylic acid in the commercial world. The standard specifies the requirements and sampling and testing methods for pure terephthalic acid.

When combined with glycols, it is used in the production of synthetic resins, fibers, and films. The Bureau of Indian Standards adopted this standard after the Petroleum, Coal, and Related Products Division Council approved the draft finalized by the Organic Chemicals Sectional Committee.

Pure terephthalic acid should exist in a white, crystalline, free-flowing powder free of foreign impurities. It is not soluble in water, chloroform, ether, or acetic acid, but slightly soluble in alcohol and completely soluble in alkalis. Additionally, terephthalic acid is extremely non-toxic.

The standard specifies that the material must meet the requirements specified in the standard when tested according to the method specified.

Tests to Be Performed By Manufacturers to Qualify For BIS Registration

The manufacturers seeking BIS registration must undergo the following tests

  • Moisture content test
  • Determination of Ash
  • Determination of color
  • Determination of Iron, cobalt, manganese, & chromium
  • Acid value test

Packing and Marking Norms for Terephthalic Acid Manufacturers

According to the standard, the material should be supplied in 1000 kg bulk containers of flexible woven plastic or in packages that are agreed upon between the purchaser and the supplier. The packages must be marked with the following information in accordance with the standard.

  • Name of material
  • The net mass of the materials in the container
  • Lot or batch number
  • Source of manufacture

The containers may also bear the Standard Mark (ISI Mark). If the product(s) conform to the requirements specified in the standard, they may be certified under the provisions of the Bureau of Indian Standards Act, 2016 and the Rules and Regulations framed thereunder.

To use the standard mark (ISI Mark), the manufacturer must obtain a BIS license from the Bureau of Indian Standards[1]. The BIS grants a license only after a successful assessment of the manufacturing infrastructure, quality control, testing capabilities, and production process.

Documents Requirements Concerning BIS Certification for Terephthalic Acid

To obtain BIS certification for Terephthalic Acid, the following documents are required by the Bureau of Indian Standards (BIS):

  1. Application form for BIS certification
  2. Test reports from BIS-recognized laboratories for physical, mechanical, and chemical properties of the product
  3. Manufacturing process flow chart and details of manufacturing machinery and equipment
  4. Quality control plan and procedures for raw material, in-process, and finished product testing
  5. Details of the testing facility and equipment used for testing
  6. List of raw materials used in the manufacturing process and their sources
  7. Copy of the valid BIS license for the manufacturing unit
  8. Undertaking a letter from the applicant stating compliance with the relevant BIS guidelines
  9. Any other document as specified by BIS from time to time.

The above documents must be submitted to BIS for evaluation and approval before granting BIS certification for Terephthalic Acid.

Process Concerning BIS Certification for Terephthalic Acid

BIS certification is mandatory for certain products, including Terephthalic Acid, sold in India. The certification ensures that the product meets safety, quality, and performance standards set by the Indian government.

Step 1: Application Submission

To apply for BIS certification, applicants need to submit a form and required documents. The documents include technical specifications, manufacturing process details, and test reports from a BIS-recognized laboratory. BIS reviews the documents to ensure compliance with Indian standards and requests additional information if necessary.

Step 2: On-Site Inspection

BIS conducts an on-site inspection to verify compliance with Indian standards. They check the manufacturing processes and equipment used in producing Terephthalic Acid. If issues are found, BIS requests corrective action.

Step 3: Sample Testing and Grant of Certification

Samples of Terephthalic Acid are taken and tested in a BIS-recognized laboratory. The samples are tested to ensure compliance with Indian standards. If the product meets all requirements, BIS grants certification.

If BIS cancels an application for registration, it means the product doesn’t meet the safety, quality, and performance standards. This could be due to reasons like not following BIS regulations, incomplete or incorrect documentation, or failing the required tests. The applicant will need to fix the issues identified by BIS and reapply for registration after ensuring compliance with the standards.


Getting BIS certification for Terephthalic Acid is difficult because it is used in various applications like polyester fibers, films, and resins. This means it must meet strict safety, quality, and performance standards to ensure that it is safe for the environment and humans.

Read Our Article: How To Get BIS Certification For Styrene Butadiene Rubber Latex?

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