Citrus Red 2 (CAS 6358-53-8) — formula C18H16N2O3, molecular weight 308.3; category dyes and pigments.
Citrus Red 2 (CAS 6358-53-8) is a chemical raw material in the dyes and pigments category. Its molecular formula C18H16N2O3 comprises 18 C, 16 H, 2 N, 3 O atoms. Its molecular weight is about 308.3. Reported physicochemical data: melting point around 311 to 315 °F (NTP, 1992), LogP about 4.5. As a sourcing and distribution partner we help locate and compare this item across domestic and cross-border channels, arranging samples and batch orders with full COA and compliance files.
| CAS Number | 6358-53-8 |
|---|---|
| Molecular Formula | C18H16N2O3 |
| Molecular Weight | 308.3 |
| Melting Point | 311 to 315 °F (NTP, 1992) |
| LogP | 4.5 |
| Applications | Used formerly as dye for orange skins that are not processed, Considered unsafe for food use by FAO/WHO committee in 1973, To color orange skins, Citrus Red No. 2 shall be used only for coloring the skins of oranges that are not intended or used for processing (or if so used are designated in the trade as Packinghouse elimination) and that meet minimum maturity standards established by or under the laws of the States in which the oranges are grown, Methods of Manufacturing: /Citrus Red No. 2/ is synthesized commercially by coupling diazotization of 2, 5-dimethoxyaniline with 2-naphthol |
| Category | Colorants|Food Additives |
Documented applications: Used formerly as dye for orange skins that are not processed, Considered unsafe for food use by FAO/WHO committee in 1973, To color orange skins, Citrus Red No. 2 shall be used only for coloring the skins of oranges that are not intended or used for processing (or if so used are designated in the trade as Packinghouse elimination) and that meet minimum maturity standards established by or under the laws of the States in which the oranges are grown, Methods of Manufacturing: /Citrus Red No. 2/ is synthesized commercially by coupling diazotization of 2, 5-dimethoxyaniline with 2-naphthol.
Citrus Red 2 is a colorant or pigment compound with CAS registry number 6358-53-8 and molecular formula C18H16N2O3 (molecular weight 308.3), belonging to the dyes and pigments segment of chemical raw materials.
CAS number: 6358-53-8
Its molecular formula C18H16N2O3 comprises 18 C, 16 H, 2 N, 3 O atoms.
Also known as: Citrus Red 2 · 柑橘红2
Category: dyes and pigments / food additives
The CAS registry number of Citrus Red 2 is 6358-53-8.
Molecular formula C18H16N2O3, molecular weight 308.3.
It is also registered under: Citrus Red 2, 柑橘红2.
Recorded applications: Used formerly as dye for orange skins that are not processed, Considered unsafe for food use by FAO/WHO committee in 1973, To color orange skins, Citrus Red No. 2 shall be used only for coloring the skins of oranges that are not intended or used for processing (or if so used are designated in the trade as Packinghouse elimination) and that meet minimum maturity standards established by or under the laws of the States in which the oranges are grown, Methods of Manufacturing: /Citrus Red No. 2/ is synthesized commercially by coupling diazotization of 2, 5-dimethoxyaniline with 2-naphthol.
Category: Colorants / Food Additives.
Packaging is agreed per order, from lab-scale packs to bulk, and confirmed with each order rather than fixed on the page. A Certificate of Analysis (COA) ships with every batch and MSDS is available; where the end use carries a regulatory limit (food contact, pharmaceutical or cosmetic), state the standard at enquiry and the grade is set against it.
Independent reference data for Citrus Red 2 (CAS 6358-53-8), compiled from public chemistry databases.
| CAS Registry Number | 6358-53-8 |
|---|---|
| PubChem CID | 22830 |
| Molecular formula | C18H16N2O3 |
| IUPAC name | 1-[(2,5-dimethoxyphenyl)diazenyl]naphthalen-2-ol |
| UNII (FDA) | 2QE5Y68984 |
| Molecular Weight | 308.3 |
|---|---|
| XLogP3 | 4.5 |
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 5 |
| Rotatable Bond Count | 4 |
| Exact Mass | 308.11609238 |
| Monoisotopic Mass | 308.11609238 |
| Topological Polar Surface Area | 63.4 |
| Heavy Atom Count | 23 |
| Melting Point | 311 to 315 °F (NTP, 1992) |
|---|---|
| Melting Point | 156 °C |
| Color Additive Status | 74.302 |
6358-53-8; C.I. Solvent Red 80; DTXSID6024838; DTXCID10809925; RefChem:1080572; CITRUS RED 2; Solvent red 80; 1-((2,5-Dimethoxyphenyl)diazenyl)naphthalen-2-ol; Citrus Red; Citrus Red No. 2; 1-[(2,5-dimethoxyphenyl)azo]-2-naphthol; 1-(2,5-Dimethoxyphenylazo)-2-naphthol; CI Solvent Red 80; Cerven rozpoustedlova 80; 1-(2,5-Dimethyloxyphenylazo)-2-naphthol; 1-[(2,5-dimethoxyphenyl)diazenyl]naphthalen-2-ol
| Regulatory & Food Contact | FDA Regulatory Status of Color Additives: Foods FDA Substance added to food: COLOR OR COLORING ADJUNCT FDA Cumulative Estimated Daily Intake (CEDI): FCS COLOUR: Food Additives CITRUS RED NO. 2 OR 2-?NAPHTHALENOL, 1-?[2-?(2,?5-?DIMETHOXYPHENYL)?DIAZENYL]?- NOT TO BE USED |
|---|
| Reported hazard statements | H351 (100%) |
|---|
H351 (100%): Suspected of causing cancer [Warning Carcinogenicity]
P203, P280, P318, P405, and P501 (click each P-code to see the statement)
Citrus Red 2 · CAS 6358-53-8 · C18H16N2O3. UNII 2QE5Y68984. Melting Point: 311 to 315 °F (NTP, 1992); Melting Point: 156 °C; Color Additive Status: 74.302.
Source: PubChem / Wikidata; the batch COA governs where values differ.
Supplier: Jinan Shenghe Chemical Co., Ltd.
中文页面: 柑橘红2