Tattoo inks and other studio products come with important safety and handling information—but knowing where to find it is only the first step. A product label identifies what you’re working with and provides essential manufacturer information, instructions, and warnings. A Safety Data Sheet (SDS) goes further, outlining chemical hazards, safe handling and storage, exposure precautions, first-aid measures, and other information you may need in the studio. Our SDS library brings together safety documents and manufacturer resources for tattoo inks and other studio supplies. Here’s how to read an SDS, understand what it does—and doesn’t—tell you about your ink and supplies. Start With the Product Label and Find the Matching SDS Before digging into an SDS, make sure the document actually applies to the product in your hand. Products from the same manufacturer—or even the same product line—can have different formulations and hazards. Start with the label and check for: Product name and manufacturer: Confirm exactly what you’re working with and who made or supplied it. Directions for use: Follow instructions for application, dilution, contact time, or other product-specific requirements. Warnings and precautions: Check for restrictions, protective measures, and exposure warnings. Lot or batch number: Make sure the code is present and legible when applicable. This information can be important for recalls, quality concerns, and adverse-event reporting. Expiration date or shelf life: Check when the product expires and whether the manufacturer places limits on use after opening. Storage instructions: Some products have specific requirements for temperature, light, ventilation, or other storage conditions. What matters most depends on the product. Contact time and dilution are critical for a disinfectant, for example, while pigment information and batch traceability may be particularly relevant for tattoo ink. Next, open Section 1: Identification of the SDS and compare the product identifier with the label. Section 1 also provides the recommended use, restrictions on use, supplier information, and emergency contact information. Then check Section 16: Other Information for the SDS preparation or most recent revision date. An older date doesn’t automatically make the document invalid, but the SDS should still apply to the formulation you’re using. Keep in mind that an SDS generally describes a product or formulation, not an individual production batch. You usually won’t find the bottle’s lot number on the SDS, which is why keeping that information from the product label matters. What the 16 Sections of an SDS Tell You SDSs use a standardized 16-section format, making it easier to find the same types of information across different products. The sections are: Identification: Product identifier, recommended use, supplier information, and emergency contact information. Hazard Identification: Hazard classifications, signal words, pictograms, hazard statements, and precautionary statements. Composition/Information on Ingredients: Required information about chemical ingredients and mixtures. First-Aid Measures: Recommended responses to relevant types of accidental exposure. Fire-Fighting Measures: Suitable extinguishing methods and hazards associated with fire. Accidental Release Measures: Precautions, containment, and cleanup procedures for spills or releases. Handling and Storage: Precautions for safe handling and appropriate storage conditions. Exposure Controls/Personal Protection: Occupational exposure limits, engineering controls, and recommended personal protective equipment. Physical and Chemical Properties: Characteristics such as appearance, odor, pH, flammability, and solubility when applicable. Stability and Reactivity: Chemical stability, incompatible materials, and conditions that could cause hazardous reactions. Toxicological Information: Routes of exposure and known health effects. Ecological Information: Information about potential environmental effects. Disposal Considerations: Guidance related to disposal. Transport Information: Shipping and transportation classifications. Regulatory Information: Relevant safety, health, and environmental regulations not addressed elsewhere. Other Information: Typically includes the SDS preparation or revision date and other relevant notes. You won’t need every section every time you handle a product. The advantage of the standardized format is knowing exactly where to look when you need information about a spill, exposure, storage requirement, or other concern. What CI Numbers Tell You About Tattoo Ink Pigments Some studio products come with additional identifiers that provide more information about their ingredients. Tattoo ink is one important example. A Colour Index (CI) number identifies a colorant through the Colour Index classification system. For example, CI 77266 identifies carbon black. This gives you a specific pigment reference beyond a commercial shade name such as “lining black.” Look for CI numbers on an ink’s ingredient label or in manufacturer documentation. A color made from several pigments may list more than one number. The Colour Index provides a reference for identifying registered colorants. A CI number tells you which colorant is being referenced, but it doesn’t tell you everything about the finished ink. It does not establish pigment concentration, particle size, purity, contaminant levels, sterility, or whether the finished product meets requirements for tattooing in a particular jurisdiction. Two inks listing the same pigment can therefore have very different finished formulations. You may also see CAS Registry Numbers in Section 3 of an SDS. CAS numbers identify chemical substances through a separate system and serve a different purpose from CI numbers, so the two shouldn’t be expected to match. Tattoo Ink Carriers and Their Role Pigment is only part of a tattoo ink formula. The pigment is dispersed in a liquid carrier system that affects properties such as consistency and how the pigment remains dispersed. Formulas vary by manufacturer and product, but ingredients may include: Water: Commonly forms part of the liquid base. “Distilled” describes a purification process and does not, by itself, mean sterile. Glycerin: Can help retain moisture and influence the consistency of a formulation. Witch hazel: Appears as part of the liquid system in some tattoo inks. Alcohols and glycols: Some formulas contain ingredients such as isopropyl alcohol or propylene glycol. Their role and concentration depend on the formulation. Don’t use the carrier list to make assumptions about microbiological safety. The presence of alcohol does not establish that an ink is sterile, and an unopened bottle isn’t proof that it’s free from microorganisms. The FDA has identified microbial contamination in sealed tattoo ink bottles. Why an SDS May Not List Every Ingredient Section 3: Composition/Information on Ingredients can be easy to mistake for a complete ingredient list. It isn’t necessarily one. Under U.S. OSHA requirements, disclosures for mixtures focus on ingredients that meet specified health-hazard reporting criteria. Some ingredients may not require disclosure, and certain chemical identities or concentrations may be withheld under trade-secret provisions. A short ingredient table therefore doesn’t automatically indicate incomplete or improper documentation. More importantly, an ingredient missing from Section 3 is not necessarily absent from the product. If you need a complete ingredient declaration, compare the SDS with the product label and any additional manufacturer documentation rather than treating Section 3 as a full formula. This distinction matters beyond tattoo ink. An SDS is designed primarily to communicate chemical hazards and safe handling information. It does not necessarily tell you whether a product is effective for a particular purpose, sterile, suitable for contact with skin, or being used according to its manufacturer’s directions. For example, an SDS for a disinfectant doesn’t replace the product label’s dilution and contact-time instructions. Likewise, an SDS for tattoo ink doesn’t establish that the finished ink is sterile or free from microbial contamination. How to Read SDS Hazard Symbols and Statements Section 2: Hazard Identification identifies the hazards associated with the product covered by the SDS. It may include hazard classifications, signal words, hazard statements, precautionary statements, and pictograms. GHS stands for the Globally Harmonized System of Classification and Labelling of Chemicals. It provides a standardized framework for communicating chemical hazards through symbols and consistent language, although individual jurisdictions implement it through their own regulations. Don’t interpret a pictogram on its own. Read it alongside the signal word, hazard statements, and precautionary statements in Section 2 to understand the specific hazard being communicated. Here are four pictograms you may encounter: Pictogram What it can indicate Exclamation mark Skin or eye irritation, skin sensitization, harmful acute toxicity, or respiratory irritation Flame Flammability, self-heating, or other fire-related hazards Health hazard silhouette Carcinogenicity, respiratory sensitization, reproductive toxicity, or target organ toxicity Corrosion Skin burns, serious eye damage, or corrosion of metals A single pictogram can represent several types of hazards, so don’t rely on the symbol alone. Read the hazard statements and other information in Section 2 to understand what the pictogram means for that particular product. Hazard Statements Explain the Potential Harm Hazard statements describe the nature of a chemical hazard and, when appropriate, its severity. You may also see them identified by standardized H-codes. For example, H319 means “Causes serious eye irritation,” while H336 means “May cause drowsiness or dizziness.” The code makes hazard information easier to reference consistently, but the statement itself tells you what the actual hazard is. Read it in the context of the specific product rather than assuming the same warning applies to every product containing a particular ingredient. Precautionary Statements Explain What to Do Precautionary statements describe recommended measures for preventing or minimizing harmful exposure, improper handling, or improper storage. They can also provide instructions for responding when an exposure occurs. These statements may appear with P-codes. For example, P305 + P351 + P338 addresses eye exposure and provides instructions for rinsing the eyes and removing contact lenses when possible. Use the full precautionary statement on the applicable label or SDS rather than relying on the code alone. Signal Words Indicate Hazard Severity When a signal word is required, you’ll see either Danger or Warning. Danger is used for more severe hazards within the applicable hazard classification, while Warning is used for less severe hazards. These words communicate chemical hazard severity. They are not overall product-safety ratings. Likewise, the absence of a particular hazard classification does not establish that a product is appropriate for every use. An SDS communicates hazards covered by the applicable hazard-communication system; it doesn’t certify effectiveness, sterility, suitability for skin contact or implantation, or freedom from allergy risk. Where to Find Handling, Storage, and First-Aid Information Once you know how a product is classified, the other SDS sections tell you more about working with it safely and responding to unexpected incidents. Use these sections to find what you need: Section 4: First-aid measures for relevant types of accidental exposure. Sections 5–6: Fire-fighting measures and precautions for accidental releases or spills. Sections 7–8: Safe handling and storage, exposure controls, and recommended personal protective equipment. Sections 9–10: Physical and chemical properties, stability, reactivity, and incompatible materials or conditions. Section 11: Toxicological information, including likely routes of exposure and known health effects. Sections 12–15: Ecological, disposal, transport, and regulatory information. In the U.S., Sections 12–15 are included as part of the standardized SDS format, but OSHA does not enforce their content because those subjects fall under other agencies’ jurisdictions. Follow applicable federal, state, and local requirements in addition to the information provided by the manufacturer. An SDS also doesn’t replace your studio’s infection-control procedures, bloodborne-pathogen precautions, product directions, or other safety requirements. Think of it as one source of information within your larger studio safety practices. If an SDS indicates that information is unavailable or that no applicable information was found, don’t automatically interpret that as evidence that a hazard has been tested for and ruled out. It simply means the SDS is not providing affirmative information about that item. A Special Consideration for Tattoo Ink: Record Lot Codes For tattoo ink, documentation should extend beyond keeping the SDS on file. A lot or batch code connects a bottle to a particular production run. That makes it possible to identify affected stock during a recall and gives manufacturers and regulators more specific information when investigating a complaint or adverse reaction. Record the brand, shade, and lot or batch number of the inks used for each client. Photographing labels can make recordkeeping easier, but make sure those photos are connected to the appropriate client or session record so you can retrieve them later. For custom mixes, record each individual ink and its lot or batch number. Recording only the name you give the finished shade won’t identify the products used to create it. If a recall identifies a product or batch you may have in your studio, compare the recall information against the exact product and lot details on your bottles. Keep potentially affected products out of use while you verify them, then follow the manufacturer’s or regulator’s recall instructions. What to Do When Labels or Safety Documents Are Incomplete If you can’t confidently identify a product or match it to the appropriate documentation, resolve the discrepancy before putting it into use. Contact the manufacturer or supplier and make your question specific: Unreadable lot or batch code: Ask whether the product’s batch can be identified or verified. Unclear shelf life: Request clarification about the expiration date, storage requirements, or any limits on use after opening. Missing ingredient information: Ask where the applicable ingredient declaration or other product information can be found. Missing or mismatched SDS: Ask for the SDS that applies to the exact product or for clarification about which document covers it. Conflicting instructions: Ask the manufacturer to clarify which directions or documentation are current. Keep in mind that SDS requirements depend on the product and applicable regulations. In the U.S., OSHA’s SDS requirements apply to hazardous workplace chemicals, so the absence of an SDS does not, by itself, establish that a product is counterfeit, unsafe, or unlawful. Unexplained inconsistencies are still worth resolving. If you can’t confidently determine what a product is, how it should be used, or which safety information applies to it, keep it out of your setup until you can. Common Questions About Safety Data Sheets Is an MSDS the Same as an SDS? They serve the same basic hazard-communication purpose, but MSDS, or Material Safety Data Sheet, is the older terminology. Under OSHA’s current Hazard Communication Standard, SDSs follow a standardized 16-section format. If you encounter an old MSDS, look for the current SDS rather than assuming the archived document reflects the product’s current formulation or hazard information. Does Having an SDS Mean a Product Is Safe? No. An SDS communicates information about chemical hazards, precautions, handling, storage, and emergency response. It does not serve as a general safety certification or establish that a product is appropriate for every possible use. For tattoo ink specifically, having an SDS also does not mean the ink or its pigments are “FDA approved.” The FDA states that no color additives are currently approved for injection into the skin for tattoos or permanent makeup. Does Every Product Need an SDS? Not necessarily. In the U.S., OSHA requires SDSs for hazardous chemicals covered by its Hazard Communication Standard. Whether a particular product requires one depends on its classification and how the applicable regulations treat it. That’s why the absence of an SDS shouldn’t automatically be interpreted as evidence that something is wrong with a product. If you’re unsure whether documentation should be available, contact the manufacturer or supplier for clarification. Know the Products in Your Studio Good product documentation is useful only if you know where to find it and how to read it. When you bring a new ink, cleaner, disinfectant, or other chemical product into your studio, check the label, review the applicable safety information, and make sure your team can access it when they need it. Start with the products already in your setup and find available documents in our SDS library. A few minutes spent understanding the products you work with can make everyday handlinga, nd unexpected situations, a lot easier.
