| Identification | More | [Name]
2,4-Dihydroxybenzoic acid | [CAS]
89-86-1 | [Synonyms]
2 4-DIHYDROXYBENZENECARBOXYLIC ACID
2,4-DIHYDROXYBENZOIC ACID
3,4-DIHYDROXYBENZOIC ACID
4-HYDROXYSALICYLIC ACID
BETA-RESORCYCLIC
BETA-RESORCYCLIC ACID
BETA-RESORCYLIC ACID
B-RESORCYLIC ACID
RARECHEM AL BE 0221
RESORCINOL-4-CARBOXYLIC ACID
2,4-Dhba
2,4-dihydroxy-benzoicaci
4-Carboxyresorcinol
4-Hydroxysalicyicacid
Benzoic acid, 2,4-dihydroxy-
beta-Resorcinolic acid
beta-resorcinolicacid
BRA
Coupler 320
p-Hydroxysalicylic acid | [EINECS(EC#)]
201-946-9 | [Molecular Formula]
C7H6O4 | [MDL Number]
MFCD00002451 | [Molecular Weight]
154.12 | [MOL File]
89-86-1.mol |
| Chemical Properties | Back Directory | [Appearance]
cream to slightly beige or pink crystalline powder | [Melting point ]
208-211 °C (dec.) (lit.) | [Boiling point ]
237.46°C (rough estimate) | [density ]
1.3725 (rough estimate) | [vapor pressure ]
0Pa at 25℃ | [FEMA ]
3798 | [refractive index ]
1.6710 (estimate) | [Fp ]
200 °C | [storage temp. ]
Inert atmosphere,Room Temperature | [solubility ]
8g/l | [form ]
Crystalline Powder | [pka]
3.11, 8.55, 14.0(at 25℃) | [color ]
Cream to slightly beige or pink | [Odor]
at 100.00?%. mild phenolic | [Water Solubility ]
8 g/L (20 ºC) | [JECFA Number]
908 | [Merck ]
14,8157 | [BRN ]
1946213 | [InChIKey]
UIAFKZKHHVMJGS-UHFFFAOYSA-N | [LogP]
0.98 at 23℃ and pH3.5 | [CAS DataBase Reference]
89-86-1(CAS DataBase Reference) | [NIST Chemistry Reference]
2,4-Dihydroxybenzoic acid(89-86-1) | [EPA Substance Registry System]
89-86-1(EPA Substance) |
| Questions And Answer | Back Directory | [Uses]
2,4-Dihydroxybenzoic acid is a useful synthetic intermediate. An organic building block for plastics and rubber products. | [Toxicity]
GRAS (FEMA). | [Usage limits]
FEMA (mg/kg): cold drink: 450; Meat, dairy, processed vegetables, 100; fudge, gel, pudding, snack food, beverages, breakfast cereals, fats, cheeses, poultry products, fish, spices, sweet sauce, dairy products, meat soup, fruit ice Egg products, jams, jelly, rehydrated vegetables, 500; soup: 250; jelly sugar: 3333; instant coffee and tea: 12.5; sugar substitute: 12500; seasoning spices: 25000. | [Chemical properties]
It appears as white needle crystal. It will contain crystal water upon crystallization from the water. It appears as an anhydride at 100 ℃. Melting point 218-219 ° C (it has a melting point of 213 ° C upon thermal shock). Soluble in hot water, ethanol, ether. Cooking in water, acid or salt solution will remove carbon dioxide. It exhibits red color upon reaction with ferric chloride. | [Application]
- The product has the chemical properties of both resorcinol and salicylic acid. It can be used in chemical reagents for colorimetric determination of iron, titanium and other elements; for organic synthesis, it is mainly used for dyes and pharmaceutical intermediates. 2, 4-dihydroxybenzoic acid is a major raw material during the production of acidic medicated pink 3BM, which consumes 157 kg per ton of dye (by 100%).
- Used as a dye intermediate, medicine and reagents
- Used as dyes, pharmaceuticals, pesticide intermediates
| [Preparation]
It is derived from the hydroxylation of resorcinol. |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing .
S37/39:Wear suitable gloves and eye/face protection . | [WGK Germany ]
1
| [RTECS ]
VH3708050
| [TSCA ]
Yes | [HS Code ]
29182990 |
| Raw materials And Preparation Products | Back Directory | [Raw materials]
Sodium bicarbonate-->Resorcinol-->2,3-Dihydroxybenzoic acid-->2,5-Dihydroxybenzoic acid | [Preparation Products]
2,6-Dihydroxybenzoic acid-->4-Methoxysalicylic acid-->2,4-Dimethoxybenzoic acid-->Methyl 2,5-dihydroxybenzoate-->Methyl 2,4-dihydroxybenzoate-->3,6-DIHYDROXYXANTHONE-->3,6-Dimethoxyxanthone-->METHYL 2,4-DIMETHOXYBENZOATE-->2,4,5-TRIHYDROXYBENZOIC ACID-->2,4-Dihydroxybenzamide-->Mulberrin-->2-BROMO-5-METHOXYPHENOL-->Protocatechuic acid-->Mordant Red 15 |
| Hazard Information | Back Directory | [Occurrence]
Reported present in avocados, beer, red wine, roast coffee, sherry, smoked sausage and white wine | [Purification Methods]
Crystallise the acid from water. [Beilstein 10 IV 1420.] |
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