SODIUM THIOSULFATE 4 ounces

SODIUM THIOSULFATE 99% CAS#10102-17-7 Na2S2O3.5H2O For metal “patina” recipes, gold extraction, “iodine clock reaction”, experiment, photographic processing, leather tanning, foot-bath treatment, swimming pool / water treatment / aquarium treatment / iodine stain remover. Avoid prolonged or repeated contact with skin. Avoid ingestion and inhalation. Use with adequate ventilation. Storage: Store in a cool, dry place.