5.
    发明专利
    未知

    公开(公告)号:BR7201569D0

    公开(公告)日:1974-12-31

    申请号:BR156972

    申请日:1972-03-17

    Applicant: BASF AG

    Abstract: Water-soluble synthetic tanning agents composed of formaldehyde condensation products of non-sulfonated aromatic hydroxy compounds or the sulfomethylation products thereof with aromatic sulfonic acids or with the formaldehyde condensation products of said sulfonic acids.

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