ChemPac-Lite — Support

ChemPac-Lite is a spreadsheet workspace built for chemical operations: inventory registers and production runs, stored as encrypted sheets in your workspace instead of loose files on a shared drive.

Lite does not assess anything and does not produce a report. It holds the register, keeps it structured, and hands it over to the ChemPac report engine when you ask it to.

Two sheet kinds exist. An inventory sheet carries substance identity, quantities, hazard data and storage conditions. A production sheet carries runs: date, product, batch reference, operator, inputs, outputs and yield.

Every column and every site-header field is optional. A sheet saves with one cell filled, or with none at all — there is no validation gate between you and the save button.

The readiness panel on a sheet counts what a push into the report engine would still ask for. It is informational: it never blocks saving, and it never changes a value you typed.

"Autofill from library" fills blank hazard cells from the bundled datasets. Values you entered yourself are always left untouched.

Each tier sets two limits: how many sheets you may create per billing cycle, and how many encrypted sheets your workspace holds at once. Both are shown on the subscription page with your current usage.

At the cycle limit, existing sheets stay fully readable and editable — only creating a new sheet is paused until the cycle rolls over or you move up a tier.

Reports made on ChemPac never consume Lite capacity, and Lite sheets never consume report credits. The two products are linked only by the shared vault and the push hand-off.

Sheet titles and sheet contents are encrypted in your browser with AES-256-GCM before upload. The key is derived from your vault passphrase with PBKDF2-SHA256 and never leaves your device.

The server stores ciphertext. We cannot read your sheets, export them for you, or restore them if the passphrase is lost — there is no recovery path, by design.

Organization sheets are sealed with an organization key wrapped individually for each member using ECDH P-256. Removing a member's grant removes their access without re-encrypting the sheets.

A push maps one inventory sheet into a new report draft: substance identity, quantity and unit, concentration, density, average daily throughput, days on site, physical state, hazard classification, storage type, pressure and temperature, plus the optional site header.

A push creates a draft only. Nothing is submitted, nothing is charged, and the sheet itself is unchanged. You review every row inside the wizard before anything is exported.

Derived regulatory fields are recalculated by the engine from the substance identity rather than copied from the sheet, so a stale value in a sheet cannot override the datasets.

Lite is billed monthly through our payment provider. Changing tier takes effect on the provider's next billing event; your sheets and their contents are unaffected by a tier change.

Cancelling stops future billing at the end of the paid period. After that the discount on ChemPac purchases stops and new sheet creation is paused.

Sheets you already created are not deleted when a subscription lapses. They stay in your workspace and stay readable and exportable, so your register never becomes hostage to a subscription.