Cotton dust, lint, and bract samples were investigated by capillary gas chromatographic methods. Early season lint and bract samples and cardroom dust sampLes from California-grown cottons were characterized by high levels of malic acid and moderate levels of citric acid, fructose, and glucose. Late season lint and bract, samples and cardroom dust sampLes from Mississippi-grown cottons were characterized by higher levels of mannitol and low levels of malic acid.