** Shares of specialty chemicals maker Aspen Aerogels ASPN.N fall about 32% to $4.97 premarket

** Cuts annual revenue forecast to between $270 million and $280 million vs previous forecast of $297 million to $317 million

** Reports Q3 net loss of $6.3 million after incurring impairment charges of $1.6 million

** Q3 sales of $73.0 million vs estimates of $71.8 million - data compiled by LSEG

** Up to last close, stock down ~37, YTD

(Reporting by Koyena Das)

((Koyena.das@thomsonreuters.com))