Molecular Formula: C₈H₈O₄
Molar mass: 168.1467 g/mol
Density: 1.351 g/cm³
Flash Point: 146.5 °C
Index of Refraction: 1.585
Melting point: 141-143 °C(lit.)
Boiling Point: 347 °C at 760 mmHg
Vapour Pressure: 2.09E-05 mmHg at 25°C
Appearance: Beige fine crystalline powder
Structure of 5-Methoxysalicylic acid (2612-02-4):
                       
Product categories of 5-Methoxy-2-nitroaniline (16133-49-6): Amides,Anilides,Anhydrides & Salts;Acids and Derivatives;Alcohols;Aromatic Carboxylic Acids;Organic acids

Carcinogenicity of 5-Methoxysalicylic acid (2612-02-4) hasn't been listed as a carcinogen by NTP, IARC,ACGIH, or CA Prop 65. And its toxicological properties have not been fully investigated.

Hazard Codes: Xi,Xn
Risk Statements:
20:  Harmful by inhalation
21:  Harmful in contact with skin
22:  Harmful if swallowed 
36:  Irritating to the eyes
37:  Irritating to the respiratory system
38:  Irritating to the skin
Safety Statements:
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36:  Wear suitable protective clothing

 5-Methoxysalicylic acid (2612-02-4) is acid and derivative which also can be called for 5-Methoxy-2-hydroxybenzoic acid ; Benzoic acid, 2-hydroxy-5-methoxy- ; m-Anisic acid, 6-hydroxy- ; Acid5-methoxysalicylic ; 2-Hydroxy-5-methoxybenzoic acid .It can be used as a pharmaceutical intermediates.
 5-Methoxysalicylic acid (2612-02-4) is hazardous,so the first aid measures and others should be known.Such as: When on the skin: first,should  flush skin with plenty of water immediatelyfor at least 15 minutes while removing contaminated clothing. Secondly,Get shoesmedical aid . Or in the eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids.Then get medical aid soon.While ,it's Inhaled: Remove from exposure and move to fresh air immediately.Give artificial respiration While not breathing. when breathing is difficult, give oxygen.And as soon as to get medical aid .Then you have the ingesting of the product : Wash mouth out with water,and get medical aid immediately.
In addition, 5-Methoxysalicylic acid (2612-02-4) can be stable under normal temperature and pressure conditions.It is not compatible with strong oxidizing agents and you must not take it with incompatible materials .And also prevent it to broken down into hazardous decomposition products: irritating and toxic fumes and gases,carbon dioxide,carbon monoxide.