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  • 8.22331 - 4-Hydroxy-1,3-phenylenediammonium dichloride

8.22331 EMD Millipore

4-Hydroxy-1,3-phenylenediammonium dichloride

4-Hydroxy-1,3-phenylenediammonium dichloride for synthesis. CAS 137-09-7, chemical formula 4-(OH)C₆H₃-1,3-(NH₂)₂ * 2 HCl., for synthesis

Synonym: Amidol, 2,4-Diaminophenol dihydrochloride, Phenol-2,4-diammonium dichloride, 1-Hydroxybenzene-2,4-diammonium dichloride

  • CAS Number 137-09-7

  • Linear Formula C₆H₁₀Cl₂N₂O

  • Molecular Weight 197.06 g/mol

  •  EC Number 205-279-4



Related Categories Biochemicals and Reagents More...
packaging   100 g in Glass bottle (8223310100)
solubility   275 g/l
mp   205 °C
pH   1 - 2 (50 g/l, H₂O, 20 °C)
bulk density   310 kg/m3
LD 50 oral   LD50 Rat 240 mg/kg
shipped in   ambient
storage temp.   Store below +30°C.
specifications   Assay (argentometric): ≥ 98.0 %
  Identity (IR): passes test

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Safety Information

HS Code 
2922 29 00
Hazard Statement(s) 
H301: Toxic if swallowed.
H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled.
H317: May cause an allergic skin reaction.
Precautionary Statement(s) 
P280: Wear protective gloves.
P302 + P352: IF ON SKIN: Wash with plenty of soap and water.
P304 + P341: IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing.
P342 + P311: If experiencing respiratory symptoms: Call a POISON CENTER/doctor.
P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician.
Storage class 
6.1C Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
WGK 2 water endangering
Carcinogenic compounds and flammable compounds labelled "Highly toxic" or "Toxic": container F. Alkyl sulfates are carcinogenic; Take particular care to avoid inhalation and skin contact. To neutralize alkyl sulfates, add dropwise (from a dropping funnel) to concentrated ice-cool Ammonia solution (Cat.No. 105426) with vigorous stirring. Before placing in container D, check the pH with pH Universal indicator strips (Cat.No. 109535).
Hazard Pictogram(s) 
GHS06  GHS06
Hazard Pictogram(s) 
GHS08  GHS08
Hazard Symbols 
Harmful  Harmful
Declaration (railroad and road) ADR, RID 
UN 2811 , 6.1, III
Declaration (transport by air) IATA-DGR 
UN 2811 , 6.1, III
Declaration (transport by sea) IMDG-Code 
UN 2811 , 6.1, III
Categories of danger 
harmful, sensitizing
R Phrase 
R 22-42/43
Harmful if swallowed.May cause sensitisation by inhalation and skin contact.
S Phrase 
S 22-24-37-45
Do not breathe dust.Avoid contact with skin.Wear suitable gloves.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
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