e.g. Benzene, DEHP, 71-43-2, BPA, phthalate

    Hydroquinone

    Chemical structure of PubChem CID 785

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    Chemical Substance Information

    • PubChem CID: 785
    • CAS: 123-31-9
    • UN NO: 3077
    • EC NO: 204-617-8
    • Safety Data Sheet: Link
    • SMILES: C1=CC(=CC=C1O)O

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    Assessment Type Carcinogenicity Mutagenicity Reproductive Toxicity Developmental Toxicity Endocrine Disruption
    Hazard Assessment Level
    High
    Medium
    Insufficient data
    for classification
    High
    High
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    Assessment Type Acute Toxicity Systemic Toxicity - Single Dose Systemic Toxicity - Repeated Dose Neurotoxicity - Single Dose Skin Sensitization Respiratory Sensitization Skin Irritation Eye Irritation
    Hazard Assessment Level
    Very High
    Insufficient data
    for classification
    Insufficient data
    for classification
    Insufficient data
    for classification
    High
    Insufficient data
    for classification
    High
    Very High
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    Assessment Type Acute Aquatic Toxicity Chronic Aquatic Toxicity
    Hazard Assessment Level
    Very High
    Very High
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    Assessment Type Persistence Bioaccumulation
    Hazard Assessment Level
    Insufficient data
    for classification
    Insufficient data
    for classification
    Assessment Type Reactivity Flammability
    Hazard Assessment Level
    Insufficient data
    for classification
    Insufficient data
    for classification
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    Hazard Diagnostic Modules

    The Hazard Diagnostic Module consists of the following four computational chemistry methods. The predicted toxicity alerts are for reference only and should be evaluated together with other available data.

    1. Substructure Alerts
    2. Similarity Alerts
    3. Read-Across
    4. Classification Models

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    Safer Alternatives

    Safer alternatives are referenced from current safer chemical databases and software logic, divided into the following three categories:

    1. The system compiles industrial uses of chemicals from the US EPA ChemView database and integrates them with the US EPA Safer Chemical Ingredients to create a safer alternatives list for each chemical. Chemicals may have multiple industrial uses, so the system uses an accordion-style display. Click the 'Suggested Safer Alternatives' tab to expand the table. If the use is broad (e.g., 'Commercial use'), the list may include more specific uses (e.g., 'Solvent'). If no information is available, refer to 'By Industrial Use (Full List)' for manual filtering.
    2. Categorized by industrial use (full list). This list contains safer chemicals for industrial uses, not necessarily replacements for the chemical on this page. You may filter by industrial use via the search bar at the top right of this tab, e.g., filter by 'Antioxidants'. Source: Safer Chemical Ingredients List
    3. Categorized by structural similarity, requiring:
      • Find chemicals with similar functional groups based on structural similarity (Tanimoto coefficient ≥ 0.8), likely having similar functions.
      • Chemicals identified as lower risk by risk assessment, such as level 3, level 4, or insufficient data.
      Practical substitution feasibility still requires domain knowledge and reference to physicochemical properties. For insufficient data (U), it means current hazard and risk assessment information is limited; thus, selection should be cautious and toxicology studies should be reviewed.
    4. Based on real-world case studies. Source: OECD SAAT

    Based on substructure, the system lists chemicals with risk levels 3 (usable but safer alternatives may be sought), 4 (safer chemicals), or insufficient data (U: not enough data to determine risk level). Information

    Name CAS Industrial Use Safety Risk Level Data Source Notes

    Name CAS Industrial Use Safety Risk Level Data Source Notes

    Name CAS Industrial Use Safety Risk Level Data Source Notes

    Name CAS Industrial Use Safety Risk Level Data Source Notes

    Name CAS Industrial Use Safety Risk Level Data Source Notes

    Name CAS Industrial Use Safety Risk Level Data Source Notes
    Name CAS Industrial Use Safety Notes
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    This chemical is not listed in the ZeroPM PFAS alternative assessment database.
    SUBSPORT+ substitution case stories

    Real-world substitution cases involving this chemical, from the SUBSPORT+ case story database (English records).

    Case Role of this chemical Alternative Sector Function Implementation Reason for substitution
    Changing from old technique for development of film to the "computer to plate" (CTP) technique in a small printing house Substituted
    • 5-Chloro-2-methyl-2H-isothiazol-3-one, methylchloroisothiazolinone (26172-55-4)
    Non-chemical alternative Computer to plate - CTP. A technique where images are transferred directly to the printing plate from computer files in a closed system.
    Printing and reproduction of recorded media Photochemical Pigment Full capacity — February 2009 in Denmark CMR sensitizing
    Advisory methods to the substitution of chemicals in graphical production Substituted
    • Distillates (petroleum), hydrotreated light (64742-47-8)
    Non-chemical alternative Computer-to-plate technology
    Manufacture of pulp, paper and paper products Printing and reproduction of recorded media Dye Cleaning agent Full capacity — 40549 CMR ecotoxicity
    Alternative to hydroquinone in preparing offset plates Substituted Non-chemical alternative Laser treatment of printing plate. Printing and reproduction of recorded media Adsorbent In use — France CMR skin/respiratory sensitizing
    Substitution of chemical products used for radiography fixation and developing with a digital system Substituted Non-chemical alternative Digitised radiography system, consisting of a display of digital medical imaging for diagnostic use with a range of software called RAIM (Radiological Archive and Image Management). Health services Photochemical X-Ray Absorber Full capacity — 2004, Spain CMR skin/respiratory sensitizing other toxic effects ecotoxicity
    Hydroquinone free oxygen scavenger product for ship boilers. Substituted
    • Diethylhydroxylamine (3710-84-7)
    Agriculture, forestry, fishery Other Adsorbent Other In use — 2010, Denmark CMR skin/respiratory sensitizing other toxic effects
    OECD SAAT alternative case studies

    Full list of OECD SAAT case studies (not filtered by chemical).

    Case Study Name Link Publish Date Publishing Organization Related Products Description