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SOURCE DIRECT.
CUT OUT THE MIDDLE.
Industrial chemicals and raw materials sourced factory-direct from China, inspected by SGS or Bureau Veritas before the container is sealed, and shipped with a complete documentation package for import compliance. We are a Shanghai-based sourcing operation with established factory relationships built over twenty years on the production floor, not over video calls.
1,200+ Shipments · 20 Years · 14 Countries
Supply Lines
Factory DirectSodium Hydrosulfide 70%
CAS 16721-80-5 · DG Class 8
Citric Acid FCC Grade
CAS 77-92-9 · FCC / USP / BP
Molecular Sieve 13X
Type 13X · 1.6mm bead · ISO
TiO₂ Rutile R996
CAS 13463-67-7 · TiO₂ ≥95%
Send a CAS number. Response in 24 hours.
Request a Quote1,200+
Shipments Completed
80+
Products in Catalog
14
Countries Served
20 YRS
China Trade Experience
Our Capabilities
TOP PRODUCTS WE SHIP.
Citric Acid Anhydrous / Monohydrate
Non-DGApplications: Food acidulant, beverage preservation, pharmaceutical chelating agent, metal cleaning, detergent builder
Titanium Dioxide Rutile R996
Non-DGApplications: Architectural and industrial paints, plastics, printing inks, ceramics, paper coatings
Isopropyl Alcohol (IPA)
DG Class 3Applications: Pharma solvent, electronics cleaning, cosmetics, hand sanitizer, PCB manufacturing
PVC Resin SG-5 / SG-3
Non-DGApplications: Rigid pressure pipe, window profiles, cable insulation, flooring, plastisol applications
Carbon Black N220 / N330 / N550
Non-DGApplications: Tire reinforcing (N220 high-abrasion, N330 HAF), rubber goods, plastics UV protection, printing inks
Melamine 99.8%
Non-DGApplications: MF resin for laminates and tableware, concrete superplasticizer feedstock, flame retardant
Soda Ash Dense (Na₂CO₃)
Non-DGApplications: Glass manufacturing feedstock, water treatment pH control, detergent production, chemical synthesis
Zinc Oxide (ZnO)
Non-DGApplications: Rubber vulcanization activator, cosmetics and sunscreen, ceramics, pharmaceuticals, paint fungicide
N-Methyl-2-Pyrrolidone (NMP)
Non-DGApplications: Lithium-ion battery electrode slurry (EV manufacturing), paint strippers, electronics, pharma synthesis
Antioxidant 1010 (Irganox 1010)
Non-DGApplications: Primary hindered-phenolic antioxidant for PE, PP, engineering plastics — prevents thermal oxidation during processing
Methyl Ethyl Ketone (MEK)
DG Class 3Applications: Coatings and varnishes, adhesives, printing inks, magnetic tape production, dewaxing solvent
Molecular Sieve 13X
Non-DGApplications: LNG and natural gas dehydration, air separation, H₂S and CO₂ removal from process streams
What We Do
END-TO-END. ONE TEAM.
FACTORY SOURCING
Direct relationships with 50+ factories across Shandong, Jiangsu, Zhejiang, and Anhui. We go there. We walk the floor. We negotiate price in Mandarin.
QC INSPECTION
Every batch inspected by SGS or Bureau Veritas before it ships. Certificate of Analysis on every order. No surprises when cargo arrives.
LOGISTICS & FREIGHT
Sea freight from Shanghai, Qingdao, or Nanjing to LA, Houston, Newark. 21 to 35 days typical transit. DG certified for Classes 3, 5.2, 6.1, 8.
DOCUMENTATION
Commercial invoice, packing list, COA, MSDS, DG Declaration, Certificate of Origin, bill of lading. Every document, every shipment.
The Process
YOU ASK.
WE DELIVER.
From first inquiry to cargo at your port: six steps, all handled by our Shanghai team.
START AN INQUIRYInquiry & Spec
Share your product name, CAS number, or HS code. We confirm the closest factory match and estimated pricing range within 24 business hours.
Factory Verification
Our team in Shanghai Pudong travels to the facility and audits production capacity, storage conditions, export licensing, and quality certifications. Samples are collected under our supervision.
Pricing & Terms
Factory-direct pricing quoted in US dollars. We include a full landed cost estimate covering sea freight, marine insurance, and destination import duties.
QC Inspection
Pre-shipment inspection by SGS or Bureau Veritas conducted before the container is sealed. A Certificate of Analysis confirming your specification is included with every shipment.
Freight & Documentation
Sea or air freight arranged from Shanghai, Qingdao, or Nanjing. Export documentation includes commercial invoice, packing list, MSDS, COA, DG Declaration, Certificate of Origin, and Bill of Lading.
Delivery
Cargo tracked to your nominated port or facility. Our team manages all post-shipment queries, customs queries, and schedules reorders on your preferred cycle.
Industries Served
WHO WE WORK WITH.
MANUFACTURING & PLASTICS
Direct supply of polyolefin stabilizers, PVC heat stabilizers, antioxidants, and colorants to plastics manufacturers across North America, Europe, and the Middle East. Consistent factory-direct pricing with SGS quality certification on every batch.
OIL & GAS
Activated alumina, molecular sieves, DMDS, and corrosion inhibitors for refineries and natural gas processing facilities worldwide. Dangerous goods certified for transport, with full IMDG documentation and UN certified packaging.
PHARMA & BIOTECH
IPA, N-Methyl-2-Pyrrolidone, pharmaceutical-grade citric acid, ascorbic acid, and feed-grade amino acids sourced to FCC, USP, or BP specification. Every batch shipped with a Certificate of Analysis and full chain-of-custody documentation.
COATINGS & ADHESIVES
Titanium dioxide rutile grades, MEK, zinc oxide, and specialty solvents for industrial coatings and adhesive manufacturers. Our TiO2 supply covers R996, R902, and rutile grades sourced directly from Shandong and Sichuan factories.
ELECTRONICS
N-Methyl-2-Pyrrolidone for lithium-ion battery electrode manufacturing, IPA for component cleaning, and specialty solvents for PCB production. Pharmaceutical-grade purity on request, with full batch traceability.
AGRICULTURE
Agrochemical intermediates, dimethyl disulfide for soil fumigation, sulfur compounds, and mineral processing chemicals for the global agricultural sector. DG certified transport for Class 3 and Class 6.1 materials.
What Buyers Say
FROM THE FIELD.
"We had been sourcing TiO2 through a broker in New Jersey for six years. Switched to Sourzi eighteen months ago and cut landed cost by 23%. The COA arrives before the container does."
Marcus T.
Purchasing Manager, coatings manufacturer, Houston, TX
"They handled our first DG shipment. Class 3 flammables out of Qingdao to the Port of LA. Every document was perfect. US Customs cleared in two days. We've done fourteen shipments since."
Sarah K.
Operations Director, specialty chemicals distributor, Los Angeles, CA
"The molecular sieves we were getting domestically kept failing QC at our gas plant. Sourzi set up a direct supply from the Henan factory, ISO 9001 certified, with preshipment SGS inspection. Problem solved."
David R.
Plant Manager, natural gas processing facility, Houston, TX
For Importers
COMMON QUESTIONS.
Ready to Source Direct?
SEND US A CAS NUMBER.
WE'LL HANDLE THE REST.
Product name, CAS number, HS code, or a rough description is enough to start. Our Shanghai team responds within 24 hours with factory-direct pricing, a landed cost estimate, and a documentation checklist for your destination port.
GET A QUOTE TODAY