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1.01306

Naphthol green B (C.I. 10020)

Name: Naphthol green B (C.I. 10020)
Brand: MM

pH indicator

Synonym(s):

Naphthol green B (C.I. 10020), Green acid 1

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About This Item

Empirical Formula (Hill Notation):

C₃₀H₁₅FeN₃Na₃O₁₅S₃

CAS Number:

19381-50-1

Molecular Weight:

878.46

UNSPSC Code:

12352107

EC Index Number:

243-010-2

NACRES:

NA.21

MDL number:

MFCD00003886

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Properties

Product Name

Naphthol green B (C.I. 10020), indicator

Quality Segment

200

form

solid

loss

≤10% loss on drying, 105°C

pH

9.3 (20 °C, 10 g/L in H₂O)

solubility

160 g/L

bulk density

620 kg/m³

λ_max

710-720 nm in water

storage temp.

2-30°C

SMILES string

[Fe](Oc5c(c6c(cc(cc6)[S](=O)(=O)[O-])cc5)N=O)(Oc3c(c4c(cc(cc4)[S](=O)(=O)[O-])cc3)N=O)Oc1c(c2c(cc(cc2)[S](=O)(=O)[O-])cc1)N=O.[Na+].[Na+].[Na+]

InChI

1S/3C10H7NO5S.Fe.3Na/c3*12-9-4-1-6-5-7(17(14,15)16)2-3-8(6)10(9)11-13;;;;/h3*1-5,12H,(H,14,15,16);;;;/q;;;+3;3*+1/p-6

InChI key

JMXROTHPANUTOJ-UHFFFAOYSA-H

Description

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ_max. (water): 710 - 720 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.05g/l; water; calc. on dried substance): ≥ 100
Loss on Drying (105°C): ≤ 10 %

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c