Buyer Resources
Buyer Documents
These files are approved factory document pack v1: TDS, SDS, stamped COA samples, certificates and UN3253 hazmat files. Stamped COAs are typical samples — shipment COA is issued per lot. This page does not publish catalogues, business-license scans, or out-of-pack lot COAs.
Company Name Note
Some documents were issued under the former company name Shandong Longgang Silicon Technology Co., Ltd. Zhongzhi continues as the same operating entity with unchanged manufacturing facilities, production team, and product portfolio.
Technical Data Sheets — approved pack v1
Six TDS files, no lot numbers. Approved factory document pack v1.
Safety Data Sheets — approved pack v1
SMP and SMA SDS, English and Chinese. Approved factory document pack v1.
Stamped COA samples — approved pack v1
Typical stamped COA sample — shipment COA issued per lot. Pack v1 examples only; not a shipment COA and not a consecutive-lot consistency set.
COA sample - SMA - Lot 26060130
Typical stamped COA sample — shipment COA issued per lot
COA sampleCOA sample - SMA - Lot 26070130
Typical stamped COA sample — shipment COA issued per lot
COA sampleCOA sample - SMA - Lot 26080130
Typical stamped COA sample — shipment COA issued per lot
COA sampleCertificates — approved pack v1
ISO 9001, ISO 14001, REACH-EU, KKDIK, K-REACH, name-change and high-tech certificates. Approved factory document pack v1.
REACH-EU Registration
Disodium metasilicate · EC 229-912-9 · CAS 6834-92-0. Tonnage coverage for a specific importer is confirmed case by case through our Only Representative.
REACHKKDIK Pre-Registration (Türkiye)
Disodyum metasilikat · Pre-SIEF approved · Only Representative: Chemleg Danışmanlık Ltd. Şti.
KKDIKK-REACH Registration (South Korea)
Disodium metasilicate · KE-12354 · 100–1,000 t/a band · Only Representative: CIRS Group Korea Co., Ltd.
K-REACHCompany name-change certificate
Approved pack v1 · Longgang to Zhongzhi legal-name change
LEGALHazmat — approved pack v1
Classification summaries and UN packing certificates for SMP and SMA (UN3253 Class 8).
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