IUPAC Name: 4-ethoxybenzoic acid
The MF of 4-ethoxybenzoic acid(619-86-3): C₉H₁₀O₃
The MW of 4-ethoxybenzoic acid(619-86-3): 166.17
EINECS: 210-616-3
mp: 197-199 °C(lit.)
Density: 1.166 g/cm³ 
Flash Point: 117.1 °C 
Boiling Point: 291.2 °C at 760 mmHg 
Index of Refraction: 1.537 
Appearance: White to light yellow crystal powder
Synonyms: ETHOXYBENZOIC ACID,4-;4-ETHYLOXYBENZOIC ACID;4-ETHOXYBENZOIC ACID;AKOS BBS-00003741;AKOS BBB/248;RARECHEM AL BO 0060;P-CARBOXYPHENETOL;P-ETHOXYBENZOIC ACID
The Structure of 4-ethoxybenzoic acid(619-86-3):

4-ethoxybenzoic acid(619-86-3) are used as intermediates of Liquid Crystals.

Hazard Codes: Xi
Risk Statements: 36/37/38
36/37/38:  Irritating to eyes, respiratory system and skin 
Safety Statements: 26-37/39-24/25-25-24
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
37/39:  Wear suitable gloves and eye/face protection 
24/25:  Avoid contact with skin and eyes 
25:  Avoid contact with eyes 
24:  Avoid contact with skin 
WGK Germany: 3
Hazard Note: Irritant

1. First Aid Measures
Ingestion:
Get medical aid. Wash mouth out with water.
Inhalation:
Remove from exposure to fresh air immediately. Get medical aid if cough or other symptoms appear.
Skin:
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
Eyes:
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
2. Handling and Storage
Storage:
Store in a cool, dry place. Store in a tightly closed container.
Handling:
Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Use only in a chemical fume hood.