Description
Method
In aqueous solutions of sulfides a pH-dependent equilibrium exists between dissolved hydrogen sulfide (H2S), hydrogen sulfide ions (HS-), and sulfide ions (S2-). In the acidic range, in which practically only dissolved
hydrogen sulfide is present, this reacts with dimethyl-p-phenylenediamine and iron(III) ions to form methylene blue. This is determined photometrically.
The method is analogous to EPA 376.2, APHA 4500-S2- D, ISO10530, and DIN 38405-26.
Safety Information according to GHS | |
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Hazard Pictogram(s) | ![]() ![]() |
Precautionary Statement(s) | P280: Wear protective gloves/ protective clothing/ eye protection/ face protection. P301 + P330 + P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P302 + P352: IF ON SKIN: Wash with plenty of soap and 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. P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician. |
Signal Word | Danger |
Storage class | 8B Non-combustible, corrosive hazardous materials |
Safety Information | |
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Hazard Symbols | ![]() |
Storage and Shipping Information | |
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Storage | Store at +15°C to +25°C. |
Transport Information | |
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Declaration (railroad and road) ADR, RID | UN 3316 Chemie-Testsatz, 9, II |
Declaration (transport by air) IATA-DGR | UN 3316 CHEMICAL KIT, 9, II |
Declaration (transport by sea) IMDG-Code | UN 3316 CHEMICAL KIT, 9, II |
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