Tartrazine, also known as FD & C Yellow No.5, CAS#1934‑21‑0, is predominantly the trisodium salt of 4,5‑dihydro‑5‑oxo‑1‑(4‑sulfophenyl)‑4‑[4‑sulfophenyl‑azo]‑1H‑pyrazole‑3‑carboxylic acid. As a classic water‑soluble azo synthetic colorant, it is widely adopted across food, pharmaceutical and cosmetic industries worldwide.
This colorant appears as fine yellow‑orange powder with good flow characteristics. When mixed with water, it produces a bright golden‑yellow solution under neutral and acidic conditions, delivering vivid and consistent coloring effect. If dissolved in concentrated sulfuric acid, it forms an orange‑yellow liquid; this solution will shift to clear yellow after water dilution. Its distinctive colour‑rendering performance makes it a reliable coloring agent for various formulation systems.
FD & C Yellow No.5 has broad application coverage. It is commonly incorporated into multiple dessert products including dessert powders, puddings, custards, gelatin goods and ice‑cream. It is also extensively used in confectionery, fruit preserves, carbonated soft drinks, instant flavored drink powders, processed meat items, as well as canned and frozen vegetables. Beyond food sector, this colorant can be added into different pharmaceutical preparations and cosmetic formulations to meet colour‑matching requirements.
Tartrazine Chemical Properties |
Melting point | 300 °C |
Boiling point | 909.54℃[at 101 325 Pa] |
density | 2.121[at 20℃] |
vapor pressure | 0Pa at 25℃ |
storage temp. | room temp |
solubility | DMSO (Sparingly, Heated), Water (Slightly) |
form | Powder |
Colour Index | 19140 |
color | Orange |
Water Solubility | 260 g/L (30 ºC) |
Sensitive | Hygroscopic |
Merck | 14,9072 |
BRN | 69850 |
Stability: | Stable. Hygroscopic. Incompatible with strong oxidizing agents. |
Biological Applications | Treating hepatitis,periodontal disease,psoriasis |
Major Application | cleaning products |
Cosmetics Ingredients Functions | HAIR DYEING |
InChIKey | UJMBCXLDXJUMFB-UHFFFAOYSA-K |
SMILES | [Na+].[Na+].[Na+].[O-]C(=O)C1=NN(c2ccc(cc2)S([O-])(=O)=O)C(=O)C1N=Nc3ccc(cc3)S([O-])(=O)=O |
LogP | -1.572 at 20℃ |
EPA Substance Registry System | Tartrazine (1934-21-0) |
Safety Information |
Hazard Codes | Xn |
Risk Statements | 42/43 |
Safety Statements | 22-36/37-45-24/25 |
WGK Germany | 1 |
RTECS | UQ6400000 |
TSCA | TSCA listed |
HS Code | 32129000 |
Storage Class | 11 - Combustible Solids |
Hazardous Substances Data | 1934-21-0(Hazardous Substances Data) |
Toxicity | LD50 oral in mouse: 12750mg/kg |
Product Application of Tartrazine, CAS#1934‑21‑0
Tartrazine, also commercially designated as FD&C Yellow #5, functions as a high‑performance synthetic water‑soluble colorant for multiple industries. It delivers reliable colour performance across varying pH environments, with negligible colour shift observed within the pH range of 3‑8, which covers most common food formulation conditions.
It boasts outstanding water solubility: up to 20 g can be fully dissolved in 100 mL of water under 25 °C ambient temperature. This pigment possesses decent resistance against light exposure and thermal processing conditions. It shows moderate tolerance toward oxidation reactions and maintains stable colour output within 10% sugar‑containing systems without obvious discoloration. Featuring a typical bright lemon‑yellow shade and high tinctorial strength, this colorant mixes moderately well with most regular food ingredients. It is widely formulated into beverages, bakery products, pet food, desserts, sweets and confectionery items, cereals, as well as ice‑cream products.
Lead Time for Shipment
For goods available in stock, shipment can be arranged within 2‑3 working days. For items requiring fresh manufacturing, the production and preparation cycle will take approximately 7‑10 working days before dispatch.
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