The MF of Benzaldehyde-2,4-disulfonic acid(88-39-1): C₇H₆O₇S₂
The MW of Benzaldehyde-2,4-disulfonic acid(88-39-1): 266.25
EINECS: 201-826-6
Density: 1.815 g/cm³ 
Index of Refraction: 1.633 
Categories: Intermediates of Dyes and Pigments
Combustion Products: Fire will produce irritating, corrosive and/or toxic gases.
Synonyms: BENZALDEHYDE-2,4-DISULFONIC ACID;2,4-Disulfonicacidbenzaldehyde;3-Benzenedisulfonicacid,4-formyl-1;4-Formyl-1,3-disulfonicacid;4-formyl-3-benzenedisulfonicacid;4-formylbenzene-1,3-disulphonicacid;4-Formylbenzene-1,3-Disulfonic Acid;Benzaldehyde-2,4-Disulfonic Acid (sodium salt)(hydrate)
The Structure of Benzaldehyde-2,4-disulfonic acid(88-39-1):

UN Number: 2985
Hazard Class: 3
Packing Group: II

1. First Aid Measures
Ingestion: Seek medical assistance.
Inhalation: Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
Skin: Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
Eyes: Immediately flush with running water for at least 20 minutes.
2. Handling and Storage
Storage: Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling: All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.