BIS Certification for Phthalic Anhydride is one of the important requirements in chemical industry. This is because the consistent quality of raw materials is essential for the manufacture of industrial resins, plasticizers and dye intermediates. Phthalic anhydride is an aromatic organic chemical that results from catalytic oxidation processes. They are sold as solid flakes or in molten form based on the industrial requirement.
It should be noted that phthalic anhydride is widely used to produce alkyd resins, unsaturated polyester resins, and coating compositions IS 5158:2025 has set high standards of quality in terms of crystallization point, colour of the molten material, free acidity, ash content, iron content, and purity profiling by GC analysis for phthalic anhydride. Such criteria ensure that each batch of phthalic anhydride will be consistent, chemically stable and suitable for industrial use.
Performance Standards for IS 5158:2025
IS 5158: 2025 is the Indian Standard for Phthalic Anhydride used in the manufacturing of plasticizers, resins, pigments and dyes. It outlines the quality and testing requirements to maintain consistency, purity and industrial-grade performance. As per the BIS (Bureau of Indian Standards), Phthalic Anhydride is:
- Evaluated for impurity content
- Checked for melting point characteristics
- Assessed for appearance standards
- Tested for chemical purity
Who needs a BIS License in India
BIS authorisation under IS 5158:2025 is required for businesses involved in manufacturing,
importing, or supplying Phthalic Acid Anhydride in India.
Applicable to:
- Manufacturers (India) - Must get BIS approval if the Phthalic Anhydride Flakes are
covered under QCO.
- Foreign Manufacturers - Need certification to export the products to India.
- Importers/Brand Owners - Must ensure that the products are BIS-certified before sale.
- Sellers/Distributors - Should only sell certified Aromatic dicarboxylic anhydride.
Testing and Inspection Requirements
To ensure consistent product quality of Phthalic Anhydride used in resins, plasticizers, dyes,
pigments and various chemical manufacturing processes, the Bureau of Indian Standards
outlines the minimum requirements under IS 5158:2025. This certification ensures that
manufacturers produce Phthalic Anhydride with high purity, stable chemical properties, and
reliable performance for industrial applications.
The BIS testing parameters and quality checks for the Phthalic Anhydride are listed below:
IS 5158:2025 Compliance for Phthalic Anhydride BIS
Certification Process
The BIS certification for Phthalic Anhydride IS 5158:2025 makes sure that the product complies
with the set standards according to the Indian Standard. This process is set by the Bureau of
Indian Standards (BIS) and includes the following steps:
- Online Registration: Manufacturers register on the BIS Manak portal by submitting company, factory, and product details. Foreign manufacturers must appoint an Authorized Indian Representative (AIR).
- Testing at BIS-Approved Laboratory: Product samples are tested in BIS-approved laboratories for chemical composition, silica content, moisture content, fineness, compressive strength, and other physical performance parameters.
- Application Submission: The application is submitted along with test reports, technical documents, and factory details. Foreign manufacturers must also submit AIR-related documents.
- Factory Inspection: The Bureau of Indian Standards officials inspect the manufacturing units to verify the production process, safety measures, and quality control system.
- Grant of BIS License: Upon successful verification of all requirements, BIS grants the certification license under Scheme-I.
- Use of ISI Mark: Once approved, the manufacturer can use the ISI mark on the product with a CM/L number, confirming that the product meets BIS standards.
what Documents are needed for bis certification under ias 5158:2025?
| Document Category | Documents Required |
|---|
| Basic Details | GST Certificate, Email ID & Contact Number, Factory & Office Address, Rent Agreement / Lease Deed (if applicable),Partnership Deed (if applicable for partnership firms) |
| Manufacturing Details | List of Machinery, Process Flow Chart, Factory Layout Plan |
| Raw Material Details | List of Raw Materials, Supplier Details, Raw Material Invoices, Raw Material Test Certificates |
| Testing & Quality Control | List of Testing Equipment, Calibration Certificates, QC/Lab In-charge Appointment Letter & Qualification |
| Production Details | Annual Installed Capacity, Last Year Production Value |
| Product & Packaging Details | Quantity per Package, Nature of Packing, Product Printing / Marking Details |
| Management Details | Top Management Details, BIS Communication Contact Person |
| Brand & Certification Documents | Trademark / Brand Certificate, Consent Letter from BIS Recognized Laboratory |
| Additional Documents | Weekly Off Details, Hygiene Document (if applicable), Relaxation Letter (if applicable), Any Other Relevant Document |
| Foreign Manufacturer Requirement | Appointment of Authorized Indian Representative (AIR) for BIS coordination and compliance in India |
The Foreign manufacturers are required to appoint an Authorized Indian Representative (AIR) in India. The representative is the local point of contact for the Bureau of Indian Standards (BIS) and takes care of all rules and compliance work in India.
Marking Requirements & License Validity
Marking Requirements
After issuance of the BIS license to the manufacturing company, the ISI Mark for Phthalic
Anhydride should be permanently marked on its packing or on the product itself. Further
information is given below:
| Requirement | Details |
|---|
| ISI Mark | Indicates that the product is BIS certified and conforms to standards |
| Standard Number | IS 5158:2025 |
| CML Number | Certification Marks License (CML) number issued by BIS |
| Manufacturer Details | Name of manufacturer or registered trademark |
| Batch / Date | Batch number, heat number, or manufacturing date for traceability |
Note: Marking is typically applied using durable stamping, tagging, or permanent printing to ensure clear identification during handling, storage, and transportation, as per BIS marking requirements.
BIS License Validity for is 5158:2025
| particulars | Details |
|---|
| Initial Validity | Typically 1 to 2 years, depending on BIS approval conditions |
| Renewal | Must be renewed before expiry by submitting the application along with the prescribed fee and updated documents |
| Surveillane | BIS may inspect factories and test samples periodically |
| Annual Fees | Annual license fee must be paid regularly |
| Compliance | Continuous compliance with BIS requirements is necessary |
| License Format | BIS is shifting towards a 10-digit license number format |
| Non-Compliance Risk | May lead to suspension or cancellation of license |
how much dose BIS Certification Cost ?
The cost of BIS Approval for Phthalic acid anhydride includes charges for application,
inspection, license, testing, and marking. These charges are payable to BIS under Scheme I.
| Charge Type | Indian Manufacturers | Foreign Manufacturers |
|---|
| Application Fee | INR 1,000 | USD 15 |
| Audit Charges | INR 7,000 | USD 3,200 – 5,900 |
| License Fee | INR 1,000 | USD 15 |
| Marking Fee | As applicable | As applicable |
| Testing Charges | As applicable | As applicable |
| EVTL India Consultancy Fee | As per actual | As per actual |
Note:
- Application fee for foreign manufacturers is payable via SWIFT (SAARC countries may pay in INR with applicable GST).
- Audit charges for foreign manufacturers vary based on country/location.
- The marking fee is determined based on the product category and production volume (MSME benefits may apply).
- Testing charges are to be paid directly to BIS-recognised laboratories.
- Consultancy fees can vary depending on product type and factory location.
Conclusion
Resins and plasticizers would face serious manufacturing difficulties in terms of batch rejections
and quality problems if IS 5158:2025 is not followed. Since this chemical is one of the main
components required by the manufacturer in production, non-compliance even with minor
standards can cause losses for the manufacturers of this product.
The BIS Certification of Phthalic Anhydride is a critical quality control procedure which assures
consistent quality, adherence to regulation and customer satisfaction. It assures that every batch
made passes through the performance criteria. EVTL India provides end-to-end certification
services for Phthalic Anhydride, ranging from application submission to testing services.
