Frequently Asked Questions

Common questions about sourcing, compliance and documentation across our product range.

What is the difference between C5/C9 and C9 petroleum resin?+

C5/C9 copolymer petroleum resins combine aliphatic and aromatic feedstocks and are selected for a balance of colour, compatibility, adhesion and softening point. C9 aromatic petroleum resins generally offer stronger aromatic compatibility and may have different colour and thermal characteristics. Performance varies significantly by grade, hydrogenation level and application, so supplier data and formulation trials should be compared.

What PA grades does SUNCHEM supply?+

SUNCHEM can source selected PA6 and PA66 grades for injection moulding, extrusion, fibre and other applications. Available viscosity, additive package, reinforcement, colour and packaging depend on the manufacturer and grade. Buyers should provide the processing method and target properties before grade selection.

Are your food additives suitable for EU and US market use?+

Suitability must be confirmed for the exact ingredient, grade, manufacturer, intended use and destination market. SUNCHEM can provide available specifications and supporting documents and can check whether a product is supplied against relevant EU, US FDA, FEMA, FCC or other requirements. Final regulatory approval and permitted use level remain the responsibility of the finished-product manufacturer and importer.

What is Zinc Pyrithione used for?+

Zinc pyrithione is an antimicrobial ingredient used in certain industrial and formulated-product applications. Permitted uses vary significantly by country and product category, and some former cosmetic uses are restricted in certain markets. Buyers must confirm the intended application, local regulatory status and required grade before sourcing.

How long does delivery take for paint and pigment chemicals from China?+

Lead time depends on production availability, quality approval, packaging, dangerous-goods booking, destination and shipping method. SUNCHEM confirms an estimated production and transit schedule for each quotation rather than applying one standard delivery time to all products.

What organic solvents does SUNCHEM supply from China?+

SUNCHEM supplies selected solvents and fine-chemical intermediates, including products used in coatings, adhesives, cleaning, extraction and chemical synthesis. Because the current category includes both true solvents and specialty intermediates, buyers should search by product name or CAS number and confirm specification, hazard class and application requirements.

Are paint and pigment chemicals REACH or RoHS compliant?+

Compliance must be checked for the exact substance, manufacturer, tonnage band, use and destination market. SUNCHEM can request available REACH, RoHS or other regulatory documentation from the selected source, but no category-wide compliance statement should be assumed.

Can you provide COA, SDS and TDS for paint and pigment chemicals?+

COA and SDS are generally available for suitable products, while TDS and additional analytical documents depend on the exact grade and manufacturer. Documentation should be confirmed before order placement, especially where impurity, colour strength, regulatory or application-specific data are critical.

What is HEDP used for in water treatment?+

HEDP is a phosphonate used as a scale and corrosion inhibitor in industrial water systems. It can help control deposits involving calcium salts and metal ions and is used in applications such as cooling-water treatment, boilers and certain cleaning formulations. Performance depends on water chemistry, pH, temperature and the complete treatment program.

Are your hair dye intermediates compliant with EU cosmetics requirements?+

Compliance depends on the exact substance, impurity profile, permitted use, concentration and current destination-market rules. SUNCHEM can provide available specifications and analytical information for evaluation, but the formulator and responsible person must confirm that the finished cosmetic product meets applicable regulations.

What water treatment chemicals does SUNCHEM supply?+

SUNCHEM can supply selected scale and corrosion inhibitors, biocides, disinfectants, coagulants and other water-treatment chemicals, including phosphonates, isocyanurates and selected brominated or non-oxidizing biocides. Availability and permitted use depend on the exact product, application and destination-market regulations.

Are your amino acids food grade or pharmaceutical grade?+

Selected amino acids may be available in food, feed, nutraceutical or pharmaceutical grades. The applicable monograph, assay, microbiological limits, endotoxin requirements and supporting certificates depend on the exact product and manufacturer. Buyers should specify the intended use and required FCC, USP, EP, JP or other standard before quotation.

What types of paint and pigment chemicals does SUNCHEM supply?+

SUNCHEM supplies selected dye and pigment intermediates, aromatic amines, aminophenols, resorcinol derivatives and other specialty chemicals used in coatings, inks, textile dyes and colourant manufacturing. Buyers should provide the exact product or CAS number because end-use suitability and regulatory requirements vary widely.

What documentation is provided with pharmaceutical intermediates?+

Available documentation may include a specification, recent COA, SDS, TDS and selected analytical or impurity information for the exact product and manufacturer. Additional items such as residual-solvent data, elemental-impurity information, REACH status or regulatory support must be confirmed case by case according to the intermediate, manufacturing site and destination market.

Which carbapenem antibiotics are available?+

Carbapenem API availability must be confirmed individually because manufacturing authorization, sterile-processing requirements, patent or market restrictions and regulatory documentation vary by product and destination. Please provide the exact API, grade, quantity and target market for a source review.

Are your APIs sourced from GMP-certified manufacturers?+

GMP status must be verified for the exact API, manufacturing site and destination market. For suitable projects, SUNCHEM can screen manufacturers and provide available GMP certificates, regulatory documents and audit-related information subject to confidentiality and supplier approval. Buyers should complete their own regulatory and quality qualification before commercial use.

What antiretroviral APIs can SUNCHEM source?+

Availability of antiretroviral APIs depends on the product, manufacturing authorization, destination market, regulatory status and current supply conditions. Buyers should provide the INN, required pharmacopoeial standard, quantity, market and dossier requirements so that SUNCHEM can confirm whether an appropriate source is available.

Frequently Asked Questions

Pharma Intermediates

Pharmaceutical Intermediates Supplier

SUNCHEM supplies 60+ pharmaceutical and chemical intermediates — including synthesis building blocks, hair dye intermediates, ARB antihypertensives, and specialty organic chemicals — sourced from verified Chinese manufacturers with full documentation.

Pharmaceutical Intermediates
60+
Intermediates in Portfolio
20+
Years Export Experience
45+
Export Markets
DOCS
COA / SDS / TDS Available

Pharmaceutical Intermediates from China

SUNCHEM's pharmaceutical intermediates portfolio covers a broad range of organic building blocks, synthesis intermediates, ARB cardiovascular APIs, hair dye precursors, and specialty chemicals — all sourced from certified Chinese manufacturers.

With 60+ products across multiple chemical categories and export capability to regulated markets (EU, US, Japan, India, Southeast Asia), SUNCHEM provides COA, SDS, and compliance documentation for seamless import and regulatory filing.

Synthesis Building Blocks Hair Dye Intermediates ARB Antihypertensives Specialty Organics Industrial Chemicals
Portfolio by Category Building Blocks Hair Dye ARBs Specialty Other 33% 25% 21% 12% 9%

What We Offer in Pharmaceutical Intermediates

Broad chemical range, reliable sourcing, and complete regulatory documentation for pharmaceutical manufacturers and importers.

Synthesis Building Blocks

Core organic intermediates including Aniline, Resorcinol, Acetic Anhydride, Maleic Anhydride, various phenols, amines, and coupling agents for pharmaceutical synthesis. Full analytical characterisation on every batch.

Hair Dye & Personal Care Intermediates

Comprehensive range of hair colour intermediates: p-Phenylenediamine HCl/Sulfate, 2,5-Diamino Anisole Sulfate, HC Blue/Red/Violet colorants, Resorcinol, 5-Amino-o-Cresol, and oxidative dye precursors with REACH compliance data.

ARBs & Specialty APIs

Angiotensin receptor blockers including Candesartan (CAS 139481-59-7), Olmesartan (CAS 144689-63-4), and other cardiovascular APIs. Plus ZnPT/Sodium Pyrithione, D-Panthenol, Gamma Oryzanol, and other specialty actives.

Chemical Categories in Our Portfolio

Three major groups within our pharmaceutical intermediates offering.

Organic Synthesis Intermediates

Aniline, Acetic Anhydride, Resorcinol, Maleic Anhydride, N-Methylpyrrolidone, Gamma-Butyrolactone, p-Cresol, m-Cresol, Phosphoric Acid, O-Anisidine, Dicyclopentadiene, carbodiimide coupling agents, boronic acids, and 20+ more synthesis-grade chemicals.

Hair Dye Intermediates

p-Phenylenediamine HCl & Sulfate, 2,5-Diamino Anisole Sulfate, 2,4-Diamino Phenetole Sulfate, 4,5-Diamino-1-(2-hydroxyethyl) Pyrazole Sulfate, 4-Nitro-o-Phenylenediamine, HC Blue 11, HC Red 1, HC Violet BS, 5-Amino-O-Cresol — all with full REACH/toxicology data.

Antimicrobials & Actives

Sodium Pyrithione (SPT, CAS 3811-73-2), Zinc Pyrithione (ZnPT, CAS 13463-41-7), D-Panthenol (provitamin B5, CAS 81-13-0), Gamma Oryzanol (CAS 11042-64-1), β-Alanine (CAS 107-95-9), and other functional actives for pharma and personal care applications.

Product Catalogue

60+ pharmaceutical intermediates — request quotation, COA, or SDS for any product.

Aniline
CAS: 62-53-3
Acetic Anhydride
CAS: 108-24-7
Resorcinol
CAS: 108-46-3
Candesartan
CAS: 139481-59-7
Olmesartan
CAS: 144689-63-4
D-Panthenol
CAS: 81-13-0
Sodium Pyrithione (SPT)
CAS: 3811-73-2
Gamma-Butyrolactone
CAS: 96-48-0

Request a Quote for Pharmaceutical Intermediates

Send us your requirements — we respond within 24 hours with pricing, availability, and regulatory documentation.

Related Product Categories

Frequently Asked Questions

What documentation is provided with pharmaceutical intermediates?+

Each product ships with a Certificate of Analysis (COA) covering HPLC purity, melting point (where applicable), and physical specification. SDS and TDS are available on request. For regulated-market imports, we provide REACH compliance statements, ICH Q3D elemental impurity data, and residual solvent testing per ICH Q3C.

Are your hair dye intermediates EU cosmetics-compliant?+

Our hair dye intermediates — including p-Phenylenediamine, Resorcinol, Aminoanisole derivatives, and HC colorants — are supplied with REACH registration data and impurity profiles. Compliance with EU Cosmetics Regulation (EC 1223/2009) is the responsibility of the formulator; we provide full analytical data to support their safety assessments.

What is the minimum order quantity?+

Standard MOQ is 1–25kg depending on the product. Common industrial intermediates (Aniline, Acetic Anhydride, Resorcinol) are available in drum quantities. Specialty or high-value intermediates can be supplied in smaller quantities from 100g. Sample quantities are available for new customers subject to NDA.

Do you supply Candesartan and Olmesartan (ARBs)?+

Yes — Candesartan (CAS 139481-59-7) and Olmesartan (CAS 144689-63-4) are available from GMP-certified Chinese manufacturers. These are API-grade materials supplied with full batch documentation. Contact info@sunchemgroup.com with your purity requirements and intended use for pricing and regulatory support.

Can you supply Sodium Pyrithione and Zinc Pyrithione?+

Yes — both Sodium Pyrithione (SPT, CAS 3811-73-2) and Zinc Pyrithione (ZnPT, CAS 13463-41-7) are available in cosmetic and industrial grades. ZnPT is widely used in anti-dandruff shampoos and antifouling coatings. We supply with full REACH documentation and particle size data. Minimum order from 1kg.

Pharmaceutical Intermediates

Pharmaceutical intermediates are the raw materials, materials, excipients and other intermediate products used in the process of producing pharmaceutical products. This kind of chemical products can be used in the synthesis of drugs.

Import of pharmaceutical intermediates from China

At present, China's pharmaceutical intermediates market is very well developed because of the abundance of pharmaceutical talents, the large amount of infrastructure, the availability of perfect supporting facilities, and the efficient information supply chain.

 

It can be said that the global pharmaceutical intermediates are purchased in China, and a large number of international companies have established supporting pharmaceutical intermediates production plants in China.

 

In the past few years, Chinese pharmaceutical companies have gone public at a very fast pace because they are on the fast track in terms of R&D, production, technology and talent with the support of the capital market. Among them, new drugs such as anti-tumor, hypertension and diabetes are being developed at a very fast pace, thus, China's CDMO and biopharmaceutical industry is developing very rapidly.

Pharmaceutical intermediates
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Our Experience about Pharmaceutical Intermediates

You want to produce pharmaceutical intermediates quickly, in which case you need a good lab team, a good pilot batch team, site qualifications for commercial batch production, and some environmental protection requirements.

The government is very strict in approving new chemical reactions, and it takes a very long time. So you need a company that can help link all the production plants and put the specific chemical reaction in the qualified plants, so sometimes a six-step chemical reaction needs to be produced in three or four plants, and only then can you get your needs met quickly.

Our Advantages

We have a professional team of pharmaceutical intermediates, and we have abundant plant resources. We know the reactions of each plant. We know the cost and method of treating wastewater and waste gas of each reaction. Therefore, we can match the most suitable plants for you quickly and offer the best price.

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