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Description
Catalogue Number	106762
Synonyms	2,2-Dihydroxy-1,3-dioxohydrindene, 2,2-Dihydroxy-1,3-indandione, Indantrione hydrate, Triketohydrindene hydrate

Physicochemical Information
Melting Point	242 °C (decomposition)
pH value	4.6 – 5.0 (10 g/l, H₂O, 20 °C)
Bulk density	680 kg/m3
Solubility	20 g/l

Toxicological Information
LD 50 oral	LD50 Rat 600 mg/kg

Safety Information according to GHS
Hazard Pictogram(s)
Hazard Statement(s)	H302: Harmful if swallowed. H315: Causes skin irritation. H319: Causes serious eye irritation.
Precautionary Statement(s)	P264: Wash skin thoroughly after handling. P280: Wear protective gloves/ eye protection/ face protection. P301 + P312: IF SWALLOWED: Call a POISON CENTER/doctor if you feel unwell. P302 + P352: IF ON SKIN: Wash with plenty of water. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P332 + P313: If skin irritation occurs: Get medical advice/ attention.
Signal Word	Warning
Storage class	10 – 13 Other liquids and solids
WGK	WGK 3 highly hazardous to water
Disposal	3 Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.

Safety Information
Categories of danger	harmful, irritant

Storage and Shipping Information
Storage	Store at +15°C to +25°C.

Specifications
Identity (IR-spectrum)	conforms
Appearance	White to yellow or brownish white crystalline powder or crystals.
Solubility (10 g/l, water)	conforms
Melting point	about 250
Suitability for amino acid analysis	conforms

Merck 106762 0100 Ninhydrin Gr For Analysis 100 GR.