naphthalene sulfonate formaldehyde condensate structure

{"cid":"91221131","title":"Concrete Additive Sodium Naphthalene Sulfonate Formaldehyde","imgUrl":"https:\/\/img.ismap.com\/nimg\/27\/f7\/74cfd09f3cfa85025803a100cf75-200x200-1.jpg","attrs":{"Price":"500USD-800USD","Brand Name":"ATET","Model Number":"SNF-A","Minimum Order Quantity":"1MT","Delivery Time":"7-10 DAYS","Certification":"ISO","Place of Origin":"CHINA","Payment Terms":"T\/T, L\/C, D\/A, D\/P, Western Union, MoneyGram","Supply Ability":"3000MT\/MONTH","Packaging Details":"20KG\/BAG,25KG\/BAG,50KG\/BAG,500KG\/BAG,550KG\/BAG,600KG\/BAG,","Appearance":"Yellow Brown powder","Solids content (%)":"92min","Content of cl- (%)":"0.3max","PH value":"7-9","Liquidity of Cement Paste\u00a0\uff08mm\uff09":"240min","Na2SO4 content (%)":"5max","Air Content(%)":"3.0max","Water-reducing\u00a0rate":"18min","Initial Setting tim":"-90~+120","Terminal Setting time":"-90~+120"}}