Dental Whitening Trays in Canada vs the US: Which Route Applies?

Quick facts

• A whitening tray is one of three products in a whitening service. The tray holds the gel, the gel does the work, and the impression is what the tray is made from.
• United States: the CFR has no named whitening tray entry. The entry that does exist is for the adjunct: 21 CFR 872.6475 describes a heat source for bleaching teeth as an AC-powered device consisting of a light or an electric heater intended to apply heat to a tooth after it is treated with a bleaching agent, and classifies it as Class I.
• United States: the whitening agent itself is not a device. Peroxide whitening preparations are regulated as drugs or cosmetics according to the claims made, and the FDA drug label database returns carbamide peroxide as a human over-the-counter drug with an oral route of administration.
• United States: the tray is made from an impression, and the impression components do have named entries. The preformed impression tray sits in 21 CFR 872.6880 as Class I; impression material sits in 21 CFR 872.3660 as Class II.
• Canada: Schedule 1 to the Medical Devices Regulations, SOR/98-282 has no named whitening tray entry either. A tray that is placed in the oral cavity reaches Class I by rule, and the whitening agent is regulated under the drug or natural health product framework rather than as a device.
• Canadian regulation text used here is current to 2026-09-21 and last amended 2026-06-17, as stated on the official consolidation.

Whitening is the one routine dental service where the device, the drug and the cosmetic sit in the same operatory at the same time. A clinic that buys a tray, a gel and a light has bought three products travelling on three different regulatory routes in both countries, and a purchase order that treats them as one category will not match any of them. This article sets out each route, the entries that do exist and the entries that do not, and what a clinic should keep on file.

What is in a whitening service?

Three products and one accessory, and each has a different regulatory character.

• The tray. A custom tray made from a dental impression, or a preformed tray bought ready to use. Its job is to hold the gel against the tooth surface and to keep it away from the gingiva. In both countries it is the least regulated item in the service.
• The gel. The whitening agent, usually hydrogen peroxide or carbamide peroxide. This is the product that carries the therapeutic claim and, in both countries, the framework that reaches it is the drug or cosmetic framework rather than the device framework.
• The light or heat source. An optional adjunct used after the gel is applied. This is the one component of a whitening service that has a named device entry in the American code.
• The impression. Where the tray is custom made, the impression tray and the impression material are separate devices with separate classes in the American code.

The American code writes the adjunct entry narrowly, and the narrowness is the point. Section 872.6475(a) describes a heat source for bleaching teeth as an AC-powered device that consists of a light or an electric heater intended to apply heat to a tooth after it is treated with a bleaching agent. The device in the section is the light, and the section presumes that the bleaching agent has already been applied by something else.

How does each part of a whitening service differ between Canada and the United States?

Item	Canada	United States
Named entry for a whitening tray	None in Schedule 1	None in the CFR
Class of the tray	Class I by rule, whether read as an oral-cavity device or as a non-invasive device	Not separately classified; the tray is an article that holds a drug or cosmetic
Named entry for the light or heat source	None in Schedule 1; classified by rule as an active device	872.6475, Class I, exempt subject to 872.9
Named entry for the impression tray	None in Schedule 1	872.6880, Class I, exempt
Named entry for the impression material	None in Schedule 1; a dental instrument or a material classified by rule	872.3660, Class II with special controls
Framework for the whitening gel	Drug or natural health product framework, not the device framework	Drug or cosmetic framework, not the device framework

Two entries in that table deserve the attention they usually do not get. The first is the impression material, which is the only Class II item in the whole service on the American side. The second is the light or heat source, which is Class I in the United States and has no named Canadian entry at all, so its Canadian class has to be derived.

How does Canada classify a whitening tray and a whitening light?

By rule, and the rules are short.

For the tray, two readings are possible and they arrive at the same class. The Regulations define an invasive device as a medical device that is intended to come into contact with the surface of the eye or penetrate the body, either through a body orifice or through the body surface. Rule 2(2) then classifies a device described in that rule that is intended to be placed in the oral or nasal cavities as far as the pharynx as Class I. A tray that sits in the oral cavity and does not pass beyond it can be read that way. Read instead as a non-invasive device, the tray falls under Rule 7(1), which classifies all other non-invasive devices as Class I. Either reading gives Class I, which is why the tray is not the compliance question in a whitening service.

For the light or heat source, the class follows from the device being active. An active device is a medical device that depends for its operation on a source of energy other than energy generated by the human body or gravity. A powered bleaching light depends on mains power, so it is active, and Rule 9(1) classifies an active therapeutic device, including any dedicated software, that is intended to be used to administer or withdraw energy to or from the body as Class II. Rule 9(2) raises the class to Class III where the administration or withdrawal is potentially hazardous, taking into account the nature of the administration or withdrawal, the intensity of the energy and the part of the body concerned.

That last sentence is written broadly enough to matter for a device that applies energy to a tooth in a patient's mouth, and it is the reason a Canadian clinic should read the maker's intended-use statement for a bleaching light rather than assuming the American Class I answer travels.

Product in the service	What it is regulated as	Canada	United States
Whitening tray	A device article that holds the gel	Class I by rule	No named entry
Impression material	A device	Classified by rule	872.3660, Class II
Preformed impression tray	A device	Classified by rule	872.6880, Class I
Whitening gel	A drug or cosmetic, not a device	Drug or natural health product framework	Drug or cosmetic framework
Bleaching light or heat source	A device	Rule 9, Class II as an active therapeutic device	872.6475, Class I

What does the whitening agent's route mean for a clinic?

It means the tray is not the product the clinic is accountable for.

In the United States, a peroxide whitening preparation is regulated according to the claims it makes. A product making only a cosmetic claim is a cosmetic; a product making a claim to affect the structure or function of the body is a drug. The FDA drug label database returns carbamide peroxide as a human over-the-counter drug with an oral route of administration, which is how the agent's own route is documented.

In Canada, the same ingredients are reached by the drug or natural health product framework. Health Canada's own consumer guidance on home tooth whitening kits describes the products by their active ingredients, notes that most are formulated with hydrogen peroxide or carbamide peroxide, and states that tooth whitening products whiten only natural teeth and not crowns, veneers, fillings or dentures, and that the results are not permanent.

For a clinic, three consequences follow. The tray and the impression are device purchases. The gel is not a device purchase, and its paperwork is a drug or natural health product record. And the light is a device in both countries, with a Class I named entry in the United States and a rule-derived class in Canada.

What should a clinic keep on file for a whitening service?

Six items, and the split between them follows the split in the routes.

• The tray's intended use. Whether the maker supplies the tray for professional or home use, since the intended use is what a classification follows.
• The impression material's classification. In the United States this is the Class II item in the service, and the maker's special-control statement belongs in the file.
• The gel's status. The drug or natural health product record, separate from the device file, including the concentration and the maker's directions.
• The light's intended use and class. The named American entry or the Canadian rule-derived class, recorded with the maker's statement of what the device does.
• The pre-treatment assessment. The maker's cautions and the contraindications recorded in the patient's file before the service.
• The adverse reaction route. Health Canada's guidance asks a user who experiences an adverse reaction to stop, keep the product, seek medical attention if needed and report the reaction to a regional product safety office; the clinic that supplied the product needs that path in writing.

Which consumables does a dental practice restock alongside its whitening supplies?

A dental practice restocks bibs, cotton rolls, impression materials and operatory consumables on the same cycle as its instruments. For practices buying at case level, the wholesale ordering page sets out account and case terms, and the B2B wholesale collection lists the lines held for institutional buyers. The alginate impression material canister covers the tray-making step, the dental bibs cover the appointment, and a practice that wants the monitoring and consumable lines together can start with the sterilization monitoring collection or the biological indicator 5-pack trial.

Sources

1. 21 CFR 872.6475, heat source for bleaching teeth
2. 21 CFR 872.9, limitations of exemptions
3. 21 CFR 872.6880, preformed impression tray
4. 21 CFR 872.3660, impression material
5. 21 CFR 872.4565, dental hand instrument
6. 21 CFR 872.6640, dental operative unit and accessories
7. Medical Devices Regulations, SOR/98-282, full text and Schedule 1
8. Health Canada, the safe use of home tooth whitening kits
9. openFDA drug label API
10. openFDA device classification API
11. FDA device classification database
12. ISO 10993-1:2018, biological evaluation of medical devices
13. ISO 14971:2019, application of risk management to medical devices
14. ISO 3630-1:2019, dental root canal instruments
15. Royal College of Dental Surgeons of Ontario, standards and guidelines
16. Canadian Dental Association
17. American Dental Association, infection control and sterilization
18. World Health Organization, oral health
19. Canadian Centre for Occupational Health and Safety, OSH answers
20. US OSHA bloodborne pathogens standard, 1910.1030

Related reading

• Dental Impression Trays in Canada vs the US
• Dental Impression Materials in Canada vs the US: Which Class Applies
• Temporary Dental Filling Materials in Canada vs the US: Which Rules Apply

CliniEco Medical supplies eye care, laboratory and dental consumables of the kind described in this article. MDEL #35334. This article is written for clinic, procurement and infection-control professionals and is not clinical guidance; the suitability of a whitening service for a patient, the gel and its concentration, and the technique used belong to the treating professional and to the requirements of the college that governs the practice.

Frequently Asked Questions

Does the FDA have an entry for a whitening tray?

No. The CFR has no named whitening tray entry. The entry that exists near this service is for the adjunct: 21 CFR 872.6475 covers a heat source for bleaching teeth, described as an AC-powered light or electric heater intended to apply heat to a tooth after it has been treated with a bleaching agent, at Class I.

How is the whitening gel regulated?

As a drug or a cosmetic, not as a device, in both countries. In the United States the classification turns on the claims made; the FDA drug label database returns carbamide peroxide as a human over-the-counter drug with an oral route of administration. In Canada Health Canada's consumer guidance addresses home tooth whitening kits by their active ingredients.

What class is a whitening light in Canada?

It is classified by rule as an active device, because it depends on a source of energy other than energy generated by the human body or gravity. Rule 9(1) classifies an active therapeutic device intended to administer or withdraw energy to or from the body as Class II, and Rule 9(2) raises it to Class III where the administration or withdrawal is potentially hazardous, taking into account the intensity of the energy and the part of the body concerned.

Which part of a whitening service is the highest class in the United States?

The impression material, when the tray is custom made. Impression material is Class II with special controls under 21 CFR 872.3660. The preformed impression tray is Class I under 21 CFR 872.6880, and the bleaching heat source is Class I under 21 CFR 872.6475.

How does Canada classify a whitening tray?

Class I. Two readings of Schedule 1 give the same answer: a device placed in the oral cavity as far as the pharynx is Class I under Rule 2(2), and a tray read as a non-invasive device is Class I under Rule 7(1). The tray is not the item in the service that carries the higher class.

What should a clinic keep on file for a whitening service?

The tray's intended use, the impression material's classification and special-control statement, the gel's drug or natural health product record kept separately from the device file, the light's intended use and class, the pre-treatment assessment, and the adverse reaction reporting route in writing.