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Name	C.I. Pigment red 57, disodium salt (8CI)	EINECS	227-497-9
CAS No.	5858-81-1	Density	1.59[at 20℃]
PSA	150.66000	LogP	3.61760
Solubility	116g/L at 25℃	Melting Point	N/A
Formula	C₁₈H₁₄N₂Na₂O₆S	Boiling Point	791.71℃[at 101 325 Pa]
Molecular Weight	430.349	Flash Point	N/A
Transport Information	N/A	Appearance	N/A
Safety	26-39	Risk Codes	41
Molecular Structure		Hazard Symbols	Xi
Synonyms	Pigment Red 57;Permanent Red F 6R;Pigment Rubine B;PigmentRubine BCL;Plastol Rubine BC;Red 201;Red No. 201;Resamine Rubine BC;RubineRed RR 1253;Segnale Red 3R;Silotermo Carmine G;Siloton Rubine 2B;SilotonRubine B;Unipure Red LC 303;Permanent Red 4B;Lithol Rubine BNA;Lithol Rubine Red Toner DK;Lithol Rubine B;2-Naphthalenecarboxylicacid, 3-hydroxy-4-[(4-methyl-2-sulfophenyl)azo]-, disodium salt (9CI);C.I.Pigment Red 57 (7CI);C.I. Pigment Red 57, disodium salt (8CI);11070 Red;C.I.15850;D and C Red 6;D and C Red No. 6;C Red 6;C Red No. 6;FDand C Red No. 6;Fuji Carmine 6B;Irgalite Red 4B;IrgaliteRubine PB;Isol Bona Rubine BK;Isol Bona Rubine BKS;Isol Bona Rubine KBK;Isol Ruby BK;Isol Ruby BKS;Japan Red 201;Japan Red No. 201;Kromon PermanentRed 4B;LC 303;	Article Data	1

C.I. Pigment red 57, disodium salt (8CI) Synthetic route

: 92-70-6
3-Hydroxy-2-naphthoic acid

: [15N]-5-methyl-2-diazobenzenesulphonic acid hydrochloride

: 5858-81-1
D&C red no. 6

Conditions

Conditions	Yield
Stage #1: 3-Hydroxy-2-naphthoic acid With sodium hydroxide In water at 50℃; Stage #2: [15N]-5-methyl-2-diazobenzenesulphonic acid hydrochloride In water at 15 - 20℃; for 2h;

: 5858-81-1
D&C red no. 6

: calcium bis[2-(3-carboxy-2-hydroxynaphthylazo)-5-methylbenzenesulfonate]

Conditions

Conditions	Yield
With calcium chloride In water at 25 - 35℃; for 1.5 - 2h; Product distribution / selectivity;

C.I. Pigment red 57, disodium salt (8CI) Uses

C.I. Pigment red 57, disodium salt (8ci) (CAS NO.5858-81-1) is mainly used to produce lake pigments.

C.I. Pigment red 57, disodium salt (8CI) Toxicity Data With Reference

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
rat	LD50	oral	> 10800mg/kg (10800mg/kg)		Science Reports of the Research Institutes, Tohoku University, Series C: Medicine. Vol. 36(1-4), Pg. 10, 1989.

C.I. Pigment red 57, disodium salt (8CI) Consensus Reports

Reported in EPA TSCA Inventory.

C.I. Pigment red 57, disodium salt (8CI) Safety Profile

Low toxicity by ingestion. When heated to decomposition it emits toxic vapors of NO_x and SO_x.

C.I. Pigment red 57, disodium salt (8CI) Specification

The C.I. Pigment red 57, disodium salt (8CI), with the CAS registry number 5858-81-1 and EINECS registry number 227-497-9, has the systematic name of disodium 3-hydroxy-4-(4-methyl-2-sulfonato-phenyl)azo-naphthalene-2-carboxylate. It is a kind of organics, and the molecular formula of the chemical is C₁₈H₁₄N₂Na₂O₆S.

The physical properties of C.I. Pigment red 57, disodium salt (8CI) are as followings: (1)#H bond acceptors: 8; (2)#H bond donors: 3; (3)#Freely Rotating Bonds: 5; (4)Polar Surface Area: 150.66 Å².

You can still convert the following datas into molecular structure:
(1)SMILES: [Na+].[Na+].[O-]S(=O)(=O)c3cc(C)ccc3N=Nc1c2ccccc2cc(C([O-])=O)c1O
(2)InChI: InChI=1/C18H14N2O6S.2Na/c1-10-6-7-14(15(8-10)27(24,25)26)19-20-16-12-5-3-2-4-11(12)9-13(17(16)21)18(22)23;;/h2-9,21H,1H3,(H,22,23)(H,24,25,26);;/q;2*+1/p-2
(3)InChIKey: VPWFPZBFBFHIIL-NUQVWONBAY

The toxicity data is as follows:

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
rat	LD50	oral	> 10800mg/kg (10800mg/kg)		Science Reports of the Research Institutes, Tohoku University, Series C: Medicine. Vol. 36(1-4), Pg. 10, 1989.

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