DNS酸安全技术说明书
Product Identification
【Product Name】4,4'-Dinitrostilbene-2,2'-disulfonic acid
【Synonyms】DNDS
【CAS】128-42-7
【Formula】C14H10N2O10S2
【Molecular Weight】430.38
【EINECS】204-885-6
【RTECS】WJ6625000
【RTECS Class】Primary Irritant
【Beilstein/Gmelin】2794486
【Beilstein Reference】3-11-00-00476

Physical and Chemical Properties
【Solubility in water】Very soluble
【Melting Point】266℃
【Usage】Chemical intermediate for yellow azo-azoxy dyes used on cotton.

First Aid Measures
【Ingestion】Emesis is not indicated due to the irritant nature of these agents. Charcoal - not recommended; it may promote vomiting and make endoscopic evaluation difficult. Immediately dilute with 4 to 8 ounces (120 to 240 ml) of milk or water (not to exceed 4 ounces/120 ml in a child). Neutralization - neutralization is not indicated. Although these agents are irritants, and therefore should not produce tissue damage, it is almost impossible to assure that a particular substance under a particular set of circumstances would not cause damage. Therefore, each patient should be examined with the idea that mucous membrane damage might have occurred.
【Inhalation】Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 anist and corticosteroid aerosols.
【Skin】Remove contaminated clothing. Wash exposed area with soap and water. If symptoms persist, seek medical attention. Launder clothing before reuse.
【Eyes】Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility. If in a medical facility, sterile saline should be used to irrigate the eyes until the cul de sac is returned to neutrality. Some alkali exposures may require prolonged irrigation.

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.

Hazards Identification
【Ingestion】Nausea, vomiting and diarrhea are possible if ingested.
【Inhalation】Cough, tachypnea, and wheezing are common after inhalation.
【Skin】Redness, swelling and pain may occur.

Exposure Controls/Personal Protection
【Personal Protection】Chemical splash ggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
【Respirators】Use NIOSH/MSHA approved respirator appropriate for exposure of concern.

Fire Fighting Measures
【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. Use agent most appropriate to extinguish fire.

Accidental Release Measures
【Small spills/leaks】Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.

Stability and Reactivity
【Stability】No data.
【Incompatibilities】Strong oxidizing agents.