ot33: appearance:yellow powder; total sulfur (%,min):66.00; insoluble sulfur on total sulfur (%,min):90.00; oil content (%) :32-34; acidity as h2so4 (%,max): 0.05 ; loss on heating(60degc)(%,max):0.50 ; ash content (%,max): 0.20 ; residue on 150um sieve (%,max):0.20: luoyang sunrise industrial co.,ltd. add: 13 n. shachang rd., xigong district, luoyang, henan, china post code: 471001 tel: 0086-379-63191196 fax: 0086-379-63190099 website: http://www.lysunrise.com.cn/ e-mail: rsy66677@vip.163.com