Periodic Table Database Schema - v0.6.3
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    HazardGroup: Group<
        {
            classes?: Group<
                {
                    adr?: Distinct<ADRClass[]>;
                    dot?: Distinct<DOTClass[]>;
                    ghs?: Distinct<GHSClass[]>;
                    whmis?: Distinct<WHMISClass[]>;
                },
            >;
            label?: Distinct<{ hazNo: HazardIdentification; unNo: UNNumber }[]>;
            nfpa?: Distinct<NFPA>;
            note?: Distinct<string>;
            pictograms?: Distinct<GHSPictogram[]>;
            references?: RefId[];
            signalWord?: Distinct<SignalWord>;
            statements?: Group<
                {
                    eu?: Distinct<EUHStatement[]>;
                    hazard?: Distinct<HStatement[]>;
                    precautionary?: Distinct<PStatement[]>;
                },
            >;
        },
    >

    Grouping of properties related to the immediate physical and health risks of a substance.