User Policy

Data Sources & Safety Data Sheets

How SNRL sources chemical data and links to Safety Data Sheets (SDS).

In short

SNRL is an index, not a library. We store structured facts about chemical products — names, CAS numbers, GHS hazards, and physical and transport data — and links to safety documentation. We do not host, mirror, or store manufacturers' or vendors' SDS PDF files. When you open an SDS, you retrieve it directly from the source's own website, through your own browser. SNRL does not fetch, proxy, cache, or re-serve that document.

How SDS links work

Every product record links to safety documentation in one of two ways:

1. Direct source SDS. For products indexed from a manufacturer's own site, the link points at that manufacturer's published SDS, and our structured data is extracted from it. Always verify our extracted data against the linked sheet.

2. Vendor catalogue records. For products sourced from open chemical databases (such as PubChem), each record links to the vendor's own product page. Where a vendor publishes its SDS at a predictable web address, we also present a “Download SDS” link to that vendor's sheet. This link is constructed from the vendor's public product identifiers and resolved by your browser at the moment you click it — SNRL never requests, downloads, or stores the file.

Important limitations — please read

Links are offered, not guaranteed. A “Download SDS” link is our best determination of where a vendor publishes that sheet. Some products — particularly minor or acquired brands — may return “SDS Not Found” or an error on the vendor's site. Availability, accuracy, and the current version of any SDS are controlled entirely by the vendor, not by SNRL.
Always use the authoritative copy. For any real decision about handling, storage, transport, or emergency response, rely on the current SDS obtained directly from the manufacturer or vendor, not on SNRL's indexed summary. Our data may lag the source, and sources revise their sheets without notice.
We are not the author. SDS documents are the intellectual property of their respective manufacturers and vendors. SNRL claims no ownership and does not reproduce them.

Where our data comes from

Open, public datasets that publish for reuse — PubChem (US NIH), ECHA (EU), and comparable regulatory and government sources.
Manufacturer and vendor websites that permit indexing. We honour each site's robots.txt. We do not index, scrape, or fetch documents from sites that disallow it, and we do not attempt to bypass access controls. Vendors who publish their catalogues into open databases have made that data available for exactly this kind of reuse.

What we store, precisely

We store

Product name, product/catalogue number, manufacturer or vendor, CAS and EC numbers, GHS classification and hazard statements, and selected physical/transport facts — as structured data — plus the source URL.

We never store

The SDS PDF itself, or any substantial reproduction of its text. Facts are not copyrightable; the document is, and it stays with its owner.

Every record is versioned, so changes are traceable over time.

Corrections & removals

If a record is inaccurate, or you are a manufacturer or vendor who would like a record corrected or removed, you can request it through the manufacturer portal. A dedicated contact address will be published here.