Health Canada 2008 — Industry information request on aluminum-containing food additives

In July 2008, Health Canada’s Bureau of Chemical Safety distributed a letter to industry stakeholders requesting information on the use of aluminum-containing food additives in Canadian food products. The letter was triggered by the 2006 Joint FAO/WHO Expert Committee on Food Additives (JECFA) reduction of the Provisional Tolerable Weekly Intake (PTWI) for aluminum from 7 mg/kg body weight per week to 1 mg/kg body weight per week, which prompted Health Canada to review whether dietary aluminum exposure among Canadians is acceptable and whether the existing Maximum Levels of Use under Division 16 of the Canadian Food and Drug Regulations remain appropriate. The accompanying Table 1 enumerates every aluminum-containing food additive permitted in Canada at the time of the request, with functional class and food-by-food maximum levels of use. The page is archived (Date modified 2017-05-04) and is preserved here as a record of the Canadian regulatory baseline for aluminum food additives as of 2008.

Key numbers

JECFA PTWI reduction context (p. 1):

• Pre-2006 PTWI for aluminum from all sources (including food additives): 7 mg/kg body weight per week.
• 2006 revised PTWI: 1 mg/kg body weight per week (a 7-fold reduction).

Canadian Food and Drug Regulations Division 16 — aluminum-containing food additives permitted in Canada under certain conditions (Table 1, pp. 4-6):

GMP = Good Manufacturing Practice (no numerical ceiling; only the amount necessary to achieve the intended technical effect). Percentages are weight-per-weight unless otherwise specified. The 900 ppm cap on flour/whole-wheat-flour applies separately to sodium aluminum sulphate and to potassium aluminum sulphate when used as a carrier of benzoyl peroxide; in each case the cap is qualified by the ”**” footnote (“in accordance with other sections — standards of identity/composition — contained in the Food and Drug Regulations”).

Canadian Environmental Protection Act, 1999 (CEPA 1999) context (p. 2):

• In 1995, aluminum sulphate, aluminum chloride, and aluminum nitrate were added to the Second Priority Substance List (PSL2).
• A State of the Science report on these aluminum salts was published in 2000.
• The PSL2 draft assessment on aluminum salts was scheduled for publication by November 29, 2008.
• Of the three PSL2 aluminum salts, only aluminum sulphate (including its potassium and sodium salts) is permitted as a Canadian food additive; aluminum chloride and aluminum nitrate are not permitted food additives in Canada.

Industry response window: letter distributed July 03, 2008; responses requested by August 22, 2008 (p. 1, 4). Responses directed to bcs-bipc@hc-sc.gc.ca, Bureau of Chemical Safety, Food Directorate.

Methods (brief)

Regulatory document, not an analytical study. No analytical methods, sampling design, or measurement instruments are described — the document is an industry consultation letter accompanied by a tabulation of Division 16 maximum levels of use for aluminum-containing food additives. The maximum levels enumerated in Table 1 are excerpted directly from the Canadian Food and Drug Regulations as in force in 2008; the document does not report any new contamination measurements.

Limitations

• The document captures the 2008 Canadian regulatory baseline for aluminum food additives; subsequent Division 16 amendments after the 2008 PSL2 assessment publication are not reflected here and should be verified against the current Food and Drug Regulations.
• Maximum Levels of Use are upper regulatory ceilings on intentional additive use, not measured occurrence values. Actual aluminum content in finished foods depends on manufacturer formulation practice within the GMP/percentage ceiling and on co-contributions from naturally occurring aluminum and food-contact materials.
• The 350 ppm potassium aluminum sulphate ceiling for sea urchin roe was an Interim Marketing Authorization (IMA) pending regulatory amendment at the time of the letter; the disposition of that IMA is not stated in the document.
• The asterisked footnotes in Table 1 condition many entries on compliance with other standards of identity/composition elsewhere in the Food and Drug Regulations; readers must consult the full Regulations text for the operative permitted-use determination.
• The page is archived (“we have archived this page and will not be updating it”); the figures stand as a 2008 snapshot.

Implications

• Certification: This document provides the Canadian regulatory baseline for intentional aluminum additive use across canned seafood, pickles/relishes, eggs, baking powder, flour (as benzoyl-peroxide carrier), beer and other malt beverages, salt, icing sugar, dried-egg products, processed cheese, and chewing gum. The Division 16 maximum levels enumerated here and the JECFA 1 mg/kg bw/week PTWI together define the regulatory backdrop for any Canadian-jurisdiction Al certification work.
• Courses: Useful as a worked example of how a JECFA PTWI revision propagates into a national regulatory review process — the 7→1 mg/kg bw/week reduction in 2006 triggered Health Canada to formally re-examine pre-existing additive permissions rather than reopen the basic toxicology.
• App: Aluminum food additives are formula-dependent (firming agents in pickles and canned seafood, leavening acids in baking powder, anticaking agents in salt and dry mixes, emulsifying salts in processed cheese, colour lakes in cake decoration). The app’s ingredient-list inference layer should recognize sodium aluminum phosphate, sodium/potassium/ammonium aluminum sulphate, sodium/calcium aluminum silicate, and magnesium aluminum silicate as Al-bearing additive identifiers permitted in Canada under Division 16.
• Microbiome: Not directly addressed by the document.

Verification notes

• Cite-key uses agency abbreviation hc (Health Canada) with the year the letter was distributed (2008), consistent with how other agency-letter sources in wiki/sources/ are keyed; the archived page’s Date modified 2017-05-04 is not a substantive content revision.
• near_duplicates lists the non-”2”-suffixed sibling PDF in the same folder, which is byte-identical (SHA-256 match) to the raw_path file.
• No matching [[regulations/canada-food-drug-regulations-division-16-aluminum]] or [[regulations/jecfa-aluminum-ptwi]] page exists yet in the taxonomy snapshot; the document references both substantively. These are flagged as backlog regulation-page candidates but are NOT created here (regulation pages require a hard agency identifier per CLAUDE.md Part 10 and are not auto-stubbed during ingest).
• matrices mixes canonical entries from the system-prompt list (dietary-intake, eggs, flour, salt) with broader food-category descriptors (food-additive, canned-seafood, pickles, baking-powder, processed-cheese, beer) flagged here as additions because no closer-fitting canonical term exists for those Division 16 regulatory scopes.
• Audit subagent (2026-06-03) flagged the original frontmatter combined sodium/potassium aluminum sulphate residue framing for the 900 ppm flour cap; verified against source p. 5 — the source presents the two caps as parallel, separate per-carrier ceilings, not a combined residue. Body text corrected.
• Audit subagent (2026-06-03) flagged (and its potassium and sodium derivatives) paraphrase of source’s (including its potassium and sodium salts) (p. 3). Body text corrected to use the source’s “salts” wording.
• Audit subagent (2026-06-03) flagged empty ingredients/products arrays starving the routing layer; populated with the in-taxonomy slugs whose pages correspond to Division 16-regulated foods (products: canned-fish, salt, flour-non-rice, fermented-beverages-non-tea-based; ingredients: eggs, wheat, processed-american-cheese). processed-american-cheese lives under ingredients/ not products/ per the current snapshot. Routing rows resolve to direct_evidence carrying the Al regulatory baseline per Part 5b. The remaining regulated foods (pickles/relishes, baking powder per se, chewing gum, icing sugar, sea urchin roe, processed-cheese-spread variants beyond processed-american-cheese, dried-egg products) lack direct in-snapshot slugs and are captured via the matrices entries instead.
• Audit subagent (2026-06-03) flagged should cite directive HMTc framing in Implications → Certification; reframed to “provides the regulatory baseline” without prescribing HMTc methodology.

Wiki pages this source may touch

• aluminum
• efsa-aluminium-twi

Page history

The five most recent substantive edits to this page. The full version history lives in git; when DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.