what is sodium benzoate used for

{"cid":"91143025","title":"Sodium Benzoate Ultraviolet Visible Spectroscopy For Total Number Of Bacteria","imgUrl":"https:\/\/img.chinax.com\/nimg\/cb\/dd\/71857ca08e2ca088b0f38e7ad21f-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"Macy","Model Number":"UV-1700","Minimum Order Quantity":"5pcs","Delivery Time":"Received payment\uff0cwithin 10 days of delivery","Certification":"CE\/ISO\/ROHS","Place of Origin":"China","Payment Terms":"T\/T,Western Union","Supply Ability":"1000pcs\/month","Packaging Details":"Carton packaging","Source Type:":"UV","Wavelength range:":"190\uff5e1100nm","Spectral Bandwidth:":"1.8nm","Wavelength accuracy:":"\u00b10.3nm","Stability:":"0.0005A\/h\uff08500nm preheated\uff09","Weight:":"28kg"}}

{"cid":"91214434","title":"Strawberry Flavor Dental Fluoride Foam 30ml 125ml Sodium Fluoride Acid Resistant","imgUrl":"https:\/\/img.chinax.com\/nimg\/c9\/ce\/f130fff991d35c3c44cb316226b2-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"I-ReHealth Dental Clinic Products","Model Number":"Dental Clinic","Minimum Order Quantity":"Negotiable","Delivery Time":"5 days","Certification":"CE","Place of Origin":"China","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Supply Ability":"20000 \/ month","Packaging Details":"Strawberry Flavor 30 mL&125ml","Ingredients":"Fluoride","Product Name":"Dental Fluoride Products","Size":"30ml&125ml"}}