Sigma-Aldrich Eriochrome Black T (C.I. 1

Grade

ACS reagent

Quality Level

200

Agency

reag. pH. Eur.

Form

powder

Potency

17590 mg/kg LD₅₀, oral (Rat)

Loss

≤7% loss on drying, 110°C

Color

black to dark brown

pH

3.7 (20 °C, 10 g/L in H₂O)

Solubility

50 g/L

Bulk Density

400‑600 kg/M³

Related Categories

Indicators

Linkage

Replaces: EX0100-5; EX0100

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Appearance: Black to dark brown-black fine powder, eventually with granular parts
Clarity of solution: passes test
Absorption maximum λ_max.(buffer pH 10.0): 612 - 616 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.02 g/L; buffer pH 10.0; calc. on dried substance): 400 - 510
Loss on drying (110 °C): ≤ 7 %
Suitability as indicator (for complexometric titration, ACS): passes test
Suitability as indicator (Reag. pH Eur): passes test

Pictograms

GHS07,GHS09

Signalword

Warning

Hcodes

H319 - H411

Pcodes

P264 - P273 - P280 - P305 + P351 + P338 - P337 + P313 - P391

Hazard Classifications

Aquatic Chronic 2 - Eye Irrit. 2

Storage Class

11 - Combustible Solids

Wgk_Germany

WGK 2

Flash_Point_F

Not applicable

Flash_Point_C

Not applicable