Sulphostanic or Sulphostannic: How To spell?
The word Sulphostanic is misspelled against Sulphostannic, an adjective meaning "pertaining to, designating, a sulphacid tin (me exactly called metasulphostannic acid), which is obtained as a dark brown amphous substance, H/SnS/, fming a well-known series salts."
Sulphostannic has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings sulphosta & ic which should not be misspelled with single 'N'
Wrong Spelling:  sulphosta-n-ic  Correct Spelling:  sulphosta-nn-ic 
Check more misspelled words of Sulphostannic to spell it correct.