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Basic Information
CAS No.: 1934-21-0
Name: Acid Yellow 23
Molecular Structure:
Molecular Structure of 1934-21-0 (Acid Yellow 23)
Formula: C16H9N4Na3O9S2
Molecular Weight: 534.37
Synonyms: 1H-Pyrazole-3-carboxylicacid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[2-(4-sulfophenyl)diazenyl]-,sodium salt (1:3);A.F. Yellow No.4;AY 23;AtulTartrazine;B 3014;Bosovit Yellow 133E;C.I. 19140;C.I. Food Yellow 4;C.I. Solvent Yellow 57;Calcocid Yellow XX;Canacert Tartrazine;Certicol Tartrazol YellowS;Cilefa Yellow T;Cogilor Yellow 113.11;Concorde Acid Tartrazine;Curon Fast Yellow 5G;D and C Yellow No. 5;C Yellow 5;Dinacid Tartarzine Yellow PFD;Duasyn Acid Yellow XX;Duasyn Acid Yellow XX-SF-LP 413;Dyacid Yellow N;Dynacid Yellow K;E 102;EdicolSupra Tartrazine N;Egg Yellow A;ErioTartrazine;Eurocert Tartrazine;C Yellow No. 5-307008;FD and C Yellow No. 5;C Yellow5;C Yellow No.5-37009;Fenazo Yellow T;FoodYellow 4;Food dye yellow number 4;HD Tartrazine;
EINECS: 217-699-5
Density: 1.93 g/cm3 (20ºC)
Melting Point: 300 °C
Boiling Point: 909.54℃[at 101 325 Pa]
Solubility: water: 260 g/L (30 °C)
Appearance: Deep yellow powder
Hazard Symbols: HarmfulXn
Risk Codes: 42/43
Safety: 22-36/37-45-24/25
PSA: 220.19000
LogP: 2.78190
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106-50-3
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     China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:+86-571-87219818

    Address:Room B25, 2-6F, Dongfangmao Commercial Center, No. 698 Changbang Road, Hangzhou, China

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  • Acid Yellow 23

  • Casno:

    1934-21-0

    Acid Yellow 23

    Min.Order: 100 Gram

    FOB Price:  USD $ 100.0-2000.0

    We are one of a few suppliers that can offer custom synthesis service of this product We are specialized in custom synthesis, chemical/pharmaceutical/ pesticides outsourcing and contract research. We are committed to prov

    SHANGHAI SYSTEAM BIOCHEM CO., LTD. is one of the professional suppliers in Chinese pharmaceutical market and is specialized in custom synthesis, chemical/pharmaceutical/ pesticides

  •  SHANGHAI SYSTEAM BIOCHEM CO., LTD

     China (Mainland)  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:86-021-58380978

    Address:Building 87,Lane 669, Dong Jing Road Shanghai,P.R.China

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  • Lemon yellow

  • Casno:

    1934-21-0

    Lemon yellow

    Min.Order: 50 Milligram

    FOB Price:  USD $ 0.0-0.0

    We are a leading chemical and life science company focused on making science and discovery easier, distributes Chemicals, Biochemical and other essential Lab products. We have strict QC for All products, and they are tested by NMR\HPLC\GC, most of

    Shenzhen Regent Biochemistry Tech Co., Ltd. is a leading chemical and life science company focused on making science and discovery easier, distributes Chemicals, Biochemical and ot

  •  Shenzhen Regent Biochemistry Tech Co., Ltd.

     Hong Kong,China  |  Contact Details

    Business Type:Lab/Research institutions

    Tel:+86-755-85201366

    Address:PINGSHAN DIS., BAOSHAN INDUSTRIAL AREA

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  • Acid Yellow 23

  • Casno:

    1934-21-0

    Acid Yellow 23

    Min.Order: 1 Metric Ton

    FOB Price:  USD $ 500.0-1200.0

    The company is located in the henan province.?and covering an area of 10,000m2,is a Chemical high-tech group company with an integrated system of researching,development,production, marketing and sales ability. It mainly produces Inorganic Chemicals,

    Henan Bright Commercial Co., Ltd.is with ISO9001 quality management system,all our products are manufactured by strict procedures. With the advanced test equipments in our Lab, all

  •  Henan Blight Industry Co., Ltd

    China (Mainland)  |  Contact Details

    Business Type:Trading Company

    Tel:13203734935 371-8284635

    Address:ZhengzhouHuayuan Road

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Consensus Reports

Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.

Specification

The IUPAC name of Acid Yellow 23 is trisodium 5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-4H-pyrazole-3-carboxylate. With the CAS registry number 1934-21-0, it is also named as 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-((4-sulfophenyl)azo)-, trisodium salt; Tartrazine. The product's categories are dyes and pigments; organics; analytical chemistry; food colors by food sanitation law in Japan. It is deep yellow powder which is soluble in water, glycerin and propylene glycol, slightly soluble in ethanol. In addition, this chemical is stable, hygroscopic and incompatible with strong oxidizing agents. it must be stored in a cool, dry place and keep container closed when not in use. Furthermore, Acid Yellow 23 is used as colorant for food, beverage, medicine, feed and cosmetic.

The other characteristics of this product can be summarized as: (1)#H bond acceptors: 13; (2)#H bond donors: 4; (3)#Freely Rotating Bonds: 6; (4)Rotatable Bond Count: 3; (5)Tautomer Count: 4; (6)Exact Mass: 533.950403; (7)MonoIsotopic Mass: 533.950403; (8)Topological Polar Surface Area: 229; (9)Heavy Atom Count: 34; (10)Complexity: 949; (11)Undefined Atom StereoCenter Count: 1; (12)Covalently-Bonded Unit Count: 4.

Preparation of Acid Yellow 23: It can be obtained by the condensation of two-hydroxy-tartaric acid and phenylhydrazine-p-sulfonic acid. Or coupling 1-(4'-sulfophenyl)-3-carboxy-5-pyrazolidone and sulfanilic acid which is diazotization, then salting with sodium chloride. Finally, we can get the product by purification.

When you are using this chemical, please be cautious about it as the following:
It may cause sensitization by inhalation and skin contact, so people should not breathe dust and avoid contact with skin and eyes. If you want to contact this product, you must wear suitable protective clothing and gloves. In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 

People can use the following data to convert to the molecule structure. 
1. SMILES: c1cc(ccc1N=Nc2c([nH]n(c2=O)c3ccc(cc3)S(=O)(=O)[O-])C(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+];
2. InChI: InChI=1/C16H12N4O9S2.3Na/c21-15-13(18-17-9-1-5-11(6-2-9)30(24,25)26)14(16(22)23)19-20(15)10-3-7-12(8-4-10)31(27,28)29;;;/h1-8,19H,(H,22,23)(H,24,25,26)(H,27,28,29);;;/q;3*+1/p-3/b18-17+;;;.

The following are the toxicity data which has been tested. 

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
human TDLo oral 14ug/kg (0.014mg/kg) PERIPHERAL NERVE AND SENSATION: PARESTHESIS

MUSCULOSKELETAL: CHANGES IN TEETH AND SUPPORTING STRUCTURES
Annals of Allergy. Vol. 17, Pg. 719, 1959.
 
mouse LD50 oral 12750mg/kg (12750mg/kg)   FAO Nutrition Meetings Report Series. Vol. 38B, Pg. 88, 1966.
rat LD50 intraperitoneal > 2gm/kg (2000mg/kg)   FAO Nutrition Meetings Report Series. Vol. 38B, Pg. 88, 1966.
rat LD50 intravenous > 2gm/kg (2000mg/kg)   Annales Pharmaceutiques Francaises. Vol. 15, Pg. 402, 1957.