Sodium rhodizonate 523-21-7 Large in supply CAS NO.523-21-7

【synonyms】

5-cyclohexene-1,2,3,4-tetrone, 5,6-dihydroxy-, disodium salt
disodium 3,4,5,6-tetraoxocyclohex-1-en-1,2-ylene dioxide
disodium 3,4,5,6-tetraoxocyclohexene-1,2-diolate
rhodizonic acid, disodium deriv.
【cas】

523-21-7
【formula】

c6na2o6
【molecular weight】

214.04
【einecs】

208-340-3
【merck】

12,8818
【beilstein/gmelin】

5181379
physical and chemical properties back to contents
【appearance】

gray-green to dark green powder.
【solubility in water】

insoluble
【melting point】

300
【usage】

used as a a reagent for barium and strontium.
first aid measures back to contents
【ingestion】

never give anything by mouth to an unconscious person. do not induce vomiting. if conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. get medical aid if irritation or symptoms occur.
【inhalation】

remove from exposure to fresh air immediately. if not breathing, give artificial respiration. if breathing is difficult, give oxygen. get medical aid if cough or other symptoms appear.
【skin】

flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. get medical aid if irritation develops or persists. wash clothing before reuse.
【eyes】

flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. if irritation develops, get medical aid.
handling and storage back to contents
【storage】

store in a tightly closed container. store in a cool, dry, well-ventilated area away from incompatible substances.
【handling】

wash thoroughly after handling. wash hands before eating. remove contaminated clothing and wash before reuse. minimize dust generation and accumulation. avoid contact with eyes, skin, and clothing. keep container tightly closed. avoid ingestion and inhalation. use with adequate ventilation.
hazards identification back to contents
【ingestion】

may cause irritation of the digestive tract. low hazard for usual industrial handling.
【inhalation】

may cause respiratory tract irritation. low hazard for usual industrial handling.
【skin】

may cause skin irritation.
【eyes】

may cause eye irritation.
【ec safety phrase】

s 22 24/25
exposure controls/personal protection back to contents
【personal protection】

eyes: wear appropriate protective eyeglasses or chemical safety goggles as described by osha's eye and face protection regulations in 29 cfr 1910.133 or european standard en166. skin: wear appropriate protective gloves to prevent skin exposure. clothing: wear appropriate protective clothing to prevent skin exposure.
【respirators】

follow the osha respirator regulations found in 29cfr 1910.134 or european standard en 149. always use a niosh or european standard en 149 approved respirator when necessary.
fire fighting measures back to contents
【fire fighting】

wear a self-contained breathing apparatus in pressure-demand, msha/niosh (approved or equivalent), and full protective gear. during a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. runoff from fire control or dilution water may cause pollution. to extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. use agent most appropriate to extinguish fire.
accidental release measures back to contents
【small spills/leaks】

vacuum or sweep up material and place into a suitable disposal container. clean up spills immediately, using the appropriate protective equipment. avoid generating dusty conditions. provide ventilation.
stability and reactivity back to contents
【disposal code】

3
【incompatibilities】

oxidizing agents.
【stability】

stable under normal temperatures and pressures.
【decomposition】

carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.
transport information back to contents
【hs code】

2914 40 90