How every number on this page is set
What this standard coversAutomatic-dishwasher rinse aids that contact tableware during the rinse cycle. GB 14930.1 Type B (food-contact-article cleaning) governs the product class.
Rinse aids is a household cleaning product that contacts food or food-contact articles, not a food. Household cleaning products are largely unregulated for heavy-metal content: the ingredient-disclosure and eco-label regimes that govern the sector (EPA Safer Choice, Green Seal GS-8, California SB 258, the New York Household Cleaner Disclosure Act) set no heavy-metal maximums. The one credible sovereign that regulates this product class directly is China’s GB 14930.1-2022 (National food safety standard — Detergents). Its Type B ceiling (detergents for tableware and food-contact articles) sets total arsenic directly; its grouped heavy-metals-as-lead ceiling (1.0 mg/kg, the sum of lead, cadmium, mercury and other heavy metals expressed as lead) bounds lead, cadmium and mercury individually as a conservative per-species reading. Every number on this page is in the product’s native basis: total heavy-metal content in the product as placed on the market. That is GB 14930.1’s own basis and the only basis a rinse-off product can be tested in.
Where no sovereign limit exists but the metal is a real or plausible contaminant of the class, the standard publishes an analytical method and an escalation rule rather than an invented threshold; those cells are listed under Screened by method below. Inorganic arsenic and methylmercury are speciation forms with no separate limit; their total-element parents (total arsenic, total mercury) bound them, and they are recorded as not material rather than left blank.
Master Limit Table
Limits in mg/kg of product as placed on the market. Tier 1 (Pb, Cd, iAs, Hg) are zero-tolerance toxics; Tier 2 (tAs, Ni, Al, Cr, Sn) carry a transitional allowance under the program’s Status A–E framework. Analytes with no government limit for this product are listed below the table (screened by method, or not material), so all ten certification analytes are accounted for.
| Analyte | Tier | HMTc limit | Basis | Strictest government | Rationale |
|---|---|---|---|---|---|
| Lead (Pb) | Tier 1 | 1 | grouped heavy-metals-as-Pb ceiling, product as placed on market (GB 14930.1 <=1.0 mg/kg, sum of Pb+Cd+Hg+... as Pb) | China (grouped ceiling) | regulatory-alignment |
| Arsenic, total (tAs) | Tier 2 | 5 | total arsenic, product as placed on the market (mg/kg) | China | regulatory-alignment |
| Cadmium (Cd) | Tier 1 | 1 | grouped heavy-metals-as-Pb ceiling, product as placed on market (GB 14930.1 <=1.0 mg/kg, sum of Pb+Cd+Hg+... as Pb) | China (grouped ceiling) | regulatory-alignment |
| Mercury, total (tHg) | Tier 1 | 1 | grouped heavy-metals-as-Pb ceiling, product as placed on market (GB 14930.1 <=1.0 mg/kg, sum of Pb+Cd+Hg+... as Pb) | China (grouped ceiling) | regulatory-alignment |
Screened by method — no government limit
No sovereign sets a heavy-metal maximum for these analytes in a household cleaning product, yet each is a real or plausible contaminant of the class. Rather than invent a number, the standard publishes the analytical method and the escalation rule for each: certification measures the analyte and escalates an out-of-band lot to ALARA review, not to a pass/fail against a fabricated threshold. This is an honest control, not a silent gap.
| Analyte | Analytical method | Escalation rule |
|---|---|---|
| Nickel (Ni) | Total nickel by ICP-MS on the product as placed on market (acid digestion). | Nickel is a confirmed dermal sensitizer and is measured in household cleaning products (zhang2010 dish soap; ecetoc1992 dish/all-purpose/specialty cleaners). No jurisdiction sets a numeric total-nickel maximum for cleaning products, so certification screens total nickel and escalates a lot above the running category control band to ALARA review rather than pass/failing on an invented number. |
| Aluminium (Al) | Total aluminium by ICP-MS on the product as placed on market. | Aluminium is Tier-2 (low toxicity by the oral/dermal routes at cleaning-product exposure) and may be a functional mineral ingredient (alumina abrasives, aluminosilicate builders). No jurisdiction sets a cleaning-product aluminium maximum. Screen total aluminium; a lot outside the functional-ingredient expectation triggers ingredient review. |
| Chromium, total (Cr) | Total chromium by ICP-MS on the product as placed on market. | Total chromium is measured in cleaning products (zhang2010; ecetoc1992). No jurisdiction sets a cleaning-product chromium maximum. Screen total chromium and reflex Cr(VI) speciation where total chromium is elevated or the formulation is oxidizing/acidic. |
| Chromium VI (Cr-VI) | Hexavalent chromium by IC-ICP-MS with alkaline extraction (US EPA 3060A / 7199) on oxidizing or acidic formulations. | Cr(VI) is measured in some consumer cleaning products (ecetoc1992) and oxidizing/acidic chemistries can stabilize it. No jurisdiction sets a cleaning-product Cr(VI) maximum. Reflex Cr(VI) speciation on oxidizing/acidic formulations and where total chromium is elevated; escalate a positive Cr(VI) result to ALARA review. |
Not material for this product
These analytes carry no ceiling because a species-specific limit is bounded by its published total-element parent, or no source and no pathway exist in the product. Each determination is rebuttable and evidence-tested (recorded in the index register), screened during certification, and recorded here rather than left as a silent gap.
| Analyte | Why it carries no ceiling for this product |
|---|---|
| Inorganic arsenic (iAs) | No jurisdiction sets an inorganic-arsenic limit for detergents or cleaning products; GB 14930.1 and every consumer-chemical trace-metal instrument regulate TOTAL arsenic (see the tAs cell), which bounds the inorganic fraction (iAs <= tAs). Inorganic arsenic is a dietary/water speciation with no separate cleaning-product instrument. No routed occurrence source measured or speciated inorganic arsenic in these products. |
| Methylmercury (MeHg) | Methylmercury has no formation or migration pathway in a detergent formulation; it is a marine-bioaccumulation speciation. Every mercury instrument that touches this product class regulates total mercury (GB 14930.1's grouped heavy-metals ceiling, see the tHg cell), which bounds any organomercury fraction. No routed occurrence source measured or speciated methylmercury in these products. |
| Tin (Sn) | Inorganic tin has no source in a detergent/dish-cleaning formulation (no tinplate or canned-food pathway). Organotin is a DISTINCT species (biocide/stabiliser) restricted by REACH Annex XVII entry 20 and is screened separately where a formulation could carry it; it does not bound, and is not bounded by, this inorganic-tin cell. No jurisdiction sets an inorganic-tin limit for cleaning products, and no routed occurrence source measured tin (the zhang2010 ten-metal panel excludes tin). |
Derivation — every government value, side by side
Each row lists the government value(s) weighed for this analyte in the total-content basis, converted to mg/kg; the HMTc limit is the strictest of them (or the disclosed read-across where no direct sovereign limit exists).
| Analyte | Government value(s) considered (mg/kg) | HMTc | Binds |
|---|---|---|---|
| Lead (Pb) | China 1 (grouped heavy-metals ceiling) | 1 | China (grouped ceiling) |
| Arsenic, total (tAs) | China 5 | 5 | China |
| Cadmium (Cd) | China 1 (grouped heavy-metals ceiling) | 1 | China (grouped ceiling) |
| Mercury, total (tHg) | China 1 (grouped heavy-metals ceiling) | 1 | China (grouped ceiling) |
Cite this standard
Pendergrass, K. “Rinse aids.” In Heavy Metal Tested & Certified (HMTc) Household Cleaning and Dishwashing standard, version 1.0 (2026-08-13). Institute of Contaminant Standards (ICS), 2026.
The evidence each limit is applied to lives on the independent Heavy Metal Index; HMTc cites it one way and never the reverse. HMTc standards are living, versioned documents; this page reflects 1.0 (2026-08-13).
Source regulations
Every government regulation weighed to set this standard, in the total-content basis of the product as placed on the market. Household cleaning products are largely unregulated for heavy-metal content; where no sovereign limit exists, the analyte is screened by method or recorded as not material rather than assigned an invented number.
| # | Regulation | Basis | Role in this standard |
|---|---|---|---|
| 1 | China GB 14930.1-2022 (National food safety standard — Detergents) | total content in product as placed on market | Binds total arsenic (Type B) and the grouped heavy-metals ceiling |