For lash and brow dyeing in the United States, silver nitrate is the one specifically listed color additive, and its permission has strict limits. The product must be a professional-use viscous gel containing no more than 4% silver nitrate, applied by a professional for no more than one minute with immediate removal. It is not intended for anyone under 16 and cannot be distributed or sold directly to consumers. A salon menu saying “professional use” does not establish that its tint meets these conditions. FDA Eye Cosmetic Safety.
The one color additive US law lists for lash and brow dyeing
The FDA final rule adding silver nitrate to 21 CFR § 73.2550 took effect on November 8, 2021. It followed a petition from GW Cosmetics GmbH. The agency approved the additive for a defined use; it did not approve every product from that manufacturer, every silver-containing tint or the salon service as a whole. FDA distinguishes color additive approval from approval of finished cosmetics, which generally do not receive FDA premarket approval. FDA silver nitrate final rule. FDA explanation of cosmetic and color additive approval.
| Color additive or dye | US lash and brow dyeing status | What that means before booking |
|---|---|---|
| Silver nitrate gel | Listed under 21 CFR § 73.2550, subject to all restrictions | Check the actual formulation, professional-use directions, age restriction and required warnings. |
| Coal-tar hair dyes, including PPD-based dyes | The hair-dye exception does not cover eyebrows or eyelashes | A product suitable for scalp hair is not thereby permitted for a lash or brow tint. |
| Henna | The FDA listing excludes eyelashes, eyebrows and the eye area | A plant-derived or “pure henna” claim does not remove the use restriction. |
| Lead acetate | Its former scalp-hair listing was repealed; it is not an alternative lash or brow dye | FDA says the repeal became effective January 6, 2022. It never supplies permission for this service. |
The comparison draws on the specific silver nitrate rule, FDA’s Hair Dyes page and its summary of permitted color additives. The summary distinguishes products such as mascara and brush-on brow makeup from the silver nitrate listing for lash and brow coloring. “Only one” here concerns dyeing or tinting the hairs under that listing; it does not mean that silver nitrate is the only color permitted in all eye cosmetics. 21 CFR § 73.2550. FDA Hair Dyes. FDA color additive summary.
The conditions a professional silver nitrate tint must meet
The regulation sets out six use restrictions. These are conditions for the professional product and its use, rather than a home application protocol. Seeing “silver nitrate” in an ingredient list is a starting point: it does not establish the concentration, physical properties or compliance of the rest of the formulation. Silver nitrate uses and restrictions.
Concentration: the finished cosmetic must contain no more than 4% silver nitrate by weight.
Formulation: its viscosity must be between 120 and 180 Pascal-seconds at normal temperature and pressure. FDA describes the product as a viscous gel.
Age: it is not intended for use on people under 16.
Contact time: application is not intended to exceed one minute and must be followed by immediate removal.
Application: a professional must apply the cosmetic.
Distribution: the cosmetic must not be distributed or directly sold to consumers.
The required label adds information a client can ask to see. It must identify silver nitrate and warn that it may permanently stain skin and irritate the eyes. It must also state the professional-use and age limits, the one-minute limit and immediate removal, immediate eye rinsing if contact occurs, and consultation with a physician if irritation persists. The warning about staining is stronger than a promise that any mark will simply wash away. Required silver nitrate labeling.
A client cannot verify a numerical viscosity range by looking at a mixing bowl. Ask the provider to identify the product documentation instead of judging whether it merely looks thick. Similarly, a short appointment does not demonstrate that the silver nitrate contact time follows its directions. The useful question is how the professional follows the specific product’s labeled limits, including immediate removal. If the provider cannot identify the product or explain these boundaries, postponing gives you time to check.
What FDA’s safety finding does and does not establish
FDA concluded there was a reasonable certainty of no harm from the petitioned use under its intended conditions. Its assessment considered estimated systemic exposure, laboratory evidence and a human intended-use study. This is meaningful evidence in favor of a compliant professional product. It also explains why a blanket statement that every lash tint is illegal or inevitably causes blindness would misrepresent the rule. FDA safety evaluation and conclusion.
The agency’s systemic exposure estimates used assumptions about skin contact, removal and frequency of use. They were estimates, rather than measurements of what every salon client absorbs. FDA concluded that exposure under the intended conditions was negligible. That conclusion should stay attached to those conditions; it does not justify a more concentrated preparation, longer contact or consumer self-application.
The laboratory findings also need careful reading. The gel’s color interfered with color-based irritation assays, limiting their usefulness. A separate assessment of treated bovine corneal tissue found no significant physical effects. The single-application human study reported some eye burning and infrequent skin staining, without clinically significant eye findings. Those results support the intended use, but they do not establish that every formulation or repeated exposure will be free of adverse effects.
The age and timing limits have specific rationales in the final rule. FDA described the age floor as a margin for facial and eye-structure development. It limited contact time to constrain potential systemic absorption. The gel formulation reduces migration toward the eye, while its label still warns about irritation. These restrictions remain part of the safety finding, even when a professional is experienced in applying tints. FDA explanation of age, formulation and contact-time restrictions.
Why “professional use” on the label is not enough
Professional application is one requirement of the silver nitrate listing. It is not an exemption allowing any dye around the eyes. Words such as “salon-grade,” “botanical” and “ophthalmologist-tested” do not identify the color additive, its permitted use or compliance with the restrictions. Such claims may describe different features of a product; none replaces the regulatory check.
In its final rule, FDA defines a professional as someone who, as part of an occupation, is permitted by the jurisdiction to apply cosmetics for dyeing eyebrows and eyelashes. FDA also says it does not regulate the professional practice of applying those cosmetics. The practical distinction is between the product’s federal color additive requirements and the local permission to perform the service. FDA discussion of professional practice.
Ask the provider which state or local authority permits the service and their role in performing it. Meeting the federal additive restrictions does not by itself answer that local question. A professional credential also does not make an otherwise unlisted color additive permissible. Check the current service rules with the relevant licensing authority before relying on a general claim that tinting is legal.
Scalp hair dyes and henna have different permissions
FDA explains that coal-tar hair dyes have a legal exception that other cosmetic color additives generally do not have. The exception has conditions, including a caution statement and directions for a preliminary skin test. Crucially, FDA says that “coal-tar hair dyes” do not include eyebrow or eyelash dyes. A salon cannot transfer the exception from scalp hair to lashes by applying the same product more carefully. FDA explanation of the coal-tar hair-dye exception.
The required hair-dye caution warns: “This product must not be used for dyeing the eyelashes or eyebrows; to do so may cause blindness.”
This is why a negative salon or home skin test cannot establish that an unlisted dye is permitted for lash or brow coloring. A test result and a color additive listing answer different questions. People who have reacted to hair dye should discuss that history with a clinician before considering another dye exposure; a salon reassurance cannot resolve the medical uncertainty. Our guide to a previous hair-dye reaction explains the separate question of testing after a reaction.
Henna has a different listing, but it still does not supply permission for brow or lash tinting. FDA’s summary states that henna is permitted for coloring hair, excluding eyelashes, eyebrows and the eye area. Purity, plant origin and the absence of PPD do not remove that exclusion. Conversely, a “PPD-free” label does not identify which other color additive gives a tint its effect or whether that use is listed. FDA henna entry.
Readers may encounter an apparent contradiction on FDA’s own website. At this review, the Hair Dyes page still says that no color additives are approved for dyeing eyebrows or eyelashes. That broad sentence conflicts with the specific silver nitrate listing and FDA’s Eye Cosmetic Safety page, which describes it. The 2021 final rule and current § 73.2550 provide the specific exception and conditions. The eCFR calls itself authoritative but unofficial; it is a continuously updated reference, rather than the official legal edition of the CFR. FDA Hair Dyes wording. FDA Eye Cosmetic Safety. Current silver nitrate regulation.
Why eye-area dye restrictions matter
FDA’s historical account describes Lash Lure as an aniline-based eyelash and eyebrow dye that caused hair loss, impaired vision and blindness. It appeared among the products used to demonstrate the need for stronger consumer protections before the 1938 Federal Food, Drug, and Cosmetic Act. That history explains the seriousness of the warnings without establishing the risk of any current formulation. FDA history exhibit.
The current FDA Eye Cosmetic Safety page likewise warns that permanent eyelash and eyebrow tints and dyes have caused serious eye injuries, including blindness. It also describes the restricted silver nitrate permission. Both facts belong in the decision: past harm should not erase the later listing, and the listing should not erase its conditions or warnings. FDA guidance on eyelash dyeing.
What import records can tell you about a salon tint
FDA Import Alert 53-06 concerns cosmetics that appear adulterated or misbranded because of color additive violations. It guides detention without physical examination. The alert covers non-permitted, uncertified or undeclared color additives; it is agency guidance to field personnel, rather than a new law or a report of how many US salons use a product. The version reviewed was published July 31, 2026. FDA Import Alert 53-06.
Two examples show why the exact product and date matter. Brow Code entries include 2022 lash and brow tints and botanical henna powder with coal-tar dye notes. Under GW Cosmetics, a 2022 RefectoCil shade entry also notes coal-tar dyes, while a July 2026 eyebrow colorant gel entry identifies non-permitted botanical colorants. These are specific public-record entries, not findings about every current product bearing either company’s name.
The GW record is particularly useful because the same company petitioned for the silver nitrate listing. A favorable decision about one intended use does not authorize its other formulations. Older records can also predate a later listing: the alert retains a 2020 entry noting silver nitrate as non-permitted, before the 2021 rule. Read the date and product description together, rather than treating a historical note as a repeal of current § 73.2550. Dated FDA import entries.
The alert cannot establish market share, the volume of products reaching salons or the present composition of a product in front of you. Absence from its Red List does not establish approval either. Use it to understand why a brand name or online availability is weak evidence of permission, then return to the actual color additive, product directions and jurisdiction before deciding.
Recognizing a reaction and getting medical care
Irritation can begin rapidly after exposure, while allergic contact dermatitis may appear later. A 2024 case report describes the usual allergic-contact pattern as lesions appearing 24–72 hours after exposure. Timing offers context, but cannot diagnose the cause of a swollen eyelid or rule out an eye injury. Akdur and colleagues, 2024.
That report, from Turkey, described a 21-year-old woman seen three days after a beauty-center lash dye application. Her packaging listed PPD, and swelling closed both eyes. Clinicians suspected a dye-related allergy; symptoms improved over two weeks with treatment. The report also described a suspected herpes lesion, and did not prove the precise allergen by challenge testing. It shows possible severity, rather than a US risk estimate or a treatment plan to copy.
A separate Eye correspondence from Glasgow, published online in 2009 and in the 2010 issue, reported severe allergic blepharoconjunctivitis after eyelash coloring. Its accessible introduction discusses chloro-PPD and possible underreporting. These non-US case reports do not establish a complication rate, compare silver nitrate with PPD, or show how often compliant US services cause injury. These reports also provide no reliable comparison of risks across skin tones, so they cannot establish a skin-type safety guarantee. Awan, Lockington and Ramaesh in Eye.
Keep the packaging or request the exact product names, developer details and lot numbers, along with when each product was used and when symptoms began. Bring that history to the clinician. If extensions were applied at the same visit, mention those products too; the extension-glue symptom guide covers that separate exposure. FDA’s Eye Cosmetic Safety page also links to its cosmetic complaint reporting instructions; reporting can follow medical care.
Questions worth asking before you book
Which exact product and color additive will you use? Ask to see the packaging and directions, including any developer or companion product.
How does this formulation meet the silver nitrate listing? Ask about the manufacturer’s documentation, professional-use restriction and labeled contact-time limit.
What warnings and age restrictions apply? The federal listing excludes under-16s; being 16 or older does not itself establish local service permission or personal suitability.
Who permits you to perform the service here? Product compliance and permission to provide the service are separate checks.
What happens if I develop irritation or swelling? Ask how you can obtain the product details and contact the provider after leaving.
Tell the provider and your clinician about previous dye or black-henna reactions, and postpone if the eye area is inflamed or infected. FDA advises avoiding eye cosmetics until that area has healed. Prior reactions deserve medical assessment before another exposure. A compliant product can satisfy the federal listing while still being unsuitable for a particular person. FDA eye-cosmetic precautions. FDA hair-dye allergy guidance.
Sources
Eye Cosmetic Safety. Consumer precautions, restricted silver nitrate use and reporting guidance.
21 CFR § 73.2550 — Silver nitrate. Current use restrictions and mandatory labeling; authoritative but unofficial eCFR text.
Listing of Color Additives Exempt From Certification; Silver Nitrate (final rule, 86 FR 55494). Final rule, effective November 8, 2021; intended-use safety assessment and definition of professional.
Hair Dyes. Coal-tar dye exception, statutory warning and lead acetate repeal timing; retains the broad no-approved-additives sentence discussed above.
Summary of Color Additives for Use in the United States in Foods, Drugs, Cosmetics, and Medical Devices. Permitted-use table, including henna exclusions and the silver nitrate entry.
Import Alert 53-06: Detention Without Physical Examination of Cosmetics That Are Adulterated and/or Misbranded Due to Color Additive Violations. July 31, 2026 version; guidance and dated product entries, rather than market prevalence data.
80 Years of the Federal Food, Drug, and Cosmetic Act (Chamber of Horrors exhibit). Historical context for Lash Lure injuries and the 1938 Act.
Allergic contact dermatitis and periorbital oedema after permanent eyelash dye (2024). Acta Marisiensis – Seria Medica 2024;70(4):270–272. A single non-US case; not an incidence study.
Severe allergic blepharoconjunctivitis after eyelash colouring (Eye, 2010). Eye 2010;24:200–201, online March 20, 2009. Accessible introductory text and publication details; not a US incidence study.
