How every number on this page is set
The standard for each analyte is the strictest maximum level set by any credible government regulator — among them the European Union, Codex Alimentarius, the US FDA, Australia/New Zealand, the Gulf states (GSO), and the national authorities of every jurisdiction that regulates the product — converted into Bouillon/stock cubes and powdered seasoning blends (dry rubs, gravy/seasoning packets)’s own as-sold basis. It is a lookup of sovereign law, carrying at most one disclosed basis conversion where the law is written in another basis, and an explicit read-across where no government regulates the exact product. A certified product sits at or below every applicable sovereign limit at once.
Where no government regulates the exact product for an analyte, the standard does not go blank or invent a number: the limit is read across from the nearest government value for an analogous product, so a certified product still sits at or below a real sovereign limit. The ratchet tightens these after publication as surveillance warrants.
Master Limit Table
All values in ppb (µg/kg), as-sold basis. 5 of 11 analytes carry a firm ceiling; the remainder are governed by mandatory control or reflex-speciation screening with no standalone number, itemised in the derivation below. A brand meeting every firm value on a like-for-like basis, and passing every control, qualifies for the mark.
| Analyte | Tier | HMTc limit | Binding basis |
|---|---|---|---|
| Lead (Pb) | Tier 1 | 1000 | strictest government ML (China) |
| Cadmium (Cd) | Tier 1 | 1000 | government read-across (Vietnam) |
| Total arsenic (tAs) | Tier 2 | 1000 | government read-across (Singapore) |
| Inorganic arsenic (iAs) | Tier 1 | 100 | strictest government ML (China) |
| Mercury, total (tHg) | Tier 1 | 50 | government read-across (Vietnam) |
| Methylmercury (MeHg) | Tier 1 | n/m | not material — controlled analyte (see note) |
| Nickel (Ni) | Tier 2 | control | mandatory control — no government ML; screened every lot (see note) |
| Tin (Sn) | Tier 2 | n/m | not material — controlled analyte (see note) |
| Aluminium (Al) | Tier 2 | n/m | not material — controlled analyte (see note) |
| Total chromium (Cr) | Tier 2 | control | mandatory control — no government ML; screened every lot (see note) |
| Hexavalent chromium (Cr-VI) | Tier 2 | control | mandatory control — no government ML; screened every lot (see note) |
Tier 1 (Pb, iAs, Hg, MeHg, Cd) are zero-tolerance toxics with no established safe threshold. Tier 2 (tAs, Ni, Sn, Al, Cr, Cr-VI) carry a 150% transitional allowance under the program’s Status A–E framework.
Derivation — the binding sovereign limit
For Bouillon/stock cubes and powdered seasoning blends (dry rubs, gravy/seasoning packets), each HMTc limit is the strictest maximum level any credible government sets for the product, named in the Binding column with the count of jurisdictions that concur at that value. Where no government regulates the analyte, the cell is a mandatory control or a not-material determination, never an invented number.
| Analyte | HMTc | Binding | Basis |
|---|---|---|---|
| Lead (Pb) | 1000 | China · +1 concurring | direct sovereign ML |
| Cadmium (Cd) | 1000 | Vietnam | disclosed read-across |
| Total arsenic (tAs) | 1000 | Singapore | disclosed read-across |
| Inorganic arsenic (iAs) | 100 | China | direct sovereign ML |
| Mercury, total (tHg) | 50 | Vietnam | disclosed read-across |
| Methylmercury (MeHg) | n/m | ≤ tHg | not material in this matrix |
| Nickel (Ni) | control | screened every lot | mandatory control — no government ML |
| Tin (Sn) | n/m | controlled | not material in this matrix |
| Aluminium (Al) | n/m | controlled | not material in this matrix |
| Total chromium (Cr) | control | screened every lot | mandatory control — no government ML |
| Hexavalent chromium (Cr-VI) | control | screened every lot | mandatory control — no government ML |
Cite this standard
Pendergrass, K. “Bouillon/stock cubes and powdered seasoning blends (dry rubs, gravy/seasoning packets).” In Heavy Metal Tested & Certified (HMTc) Herbs, Spices, Seasonings and Salt standard, version 1.0. Institute of Contaminant Standards (ICS), 2026. DOI: registration pending.
The literature baseline for every analyte is maintained independently at the Heavy Metal Index. This certification standard applies those findings; the two are kept editorially separate by design.