Refractive index database

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Optical constants of C8H9NO2 (Acetaminophen)
Juntunen et al. 2024: n 1.10–1.65 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]


Conditions & Spec sheet

temperature: 23 °C


Avicel PH102 microcrystalline cellulose. Powder. 23 °C


C. Juntunen, A. J. Rish, C. A. Anderson, Y. Sung. Refractive index measurement of pharmaceutical powders in the short-wave infrared range using index matching assisted with phase imaging, Powder Technol. 438, 119621-23149 (2024)


[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]


Acetaminophen (Paracetamol), C8H9NO2

Acetaminophen, also known as paracetamol, is a widely used over-the-counter analgesic (pain reliever) and antipyretic (fever reducer). It is commonly employed to relieve mild to moderate pain from headaches, muscle aches, menstrual periods, colds and sore throats, toothaches, backaches, and reactions to vaccinations (shots), as well as to reduce fever. Acetaminophen operates by inhibiting the production of prostaglandins, chemicals in the body that cause pain and inflammation. While effective for mild pain relief and fever reduction, acetaminophen does not reduce inflammation, as do nonsteroidal anti-inflammatory drugs (NSAIDs) such as aspirin or ibuprofen. It is available in various forms, including tablets, capsules, liquid suspensions, and as an ingredient in a wide array of combination medications.

Other names

  • Paracetamol
  • APAP
  • N-acetyl-p-aminophenol
  • Acetamol
  • Tempra
  • Tylenol
  • Panadol
  • CAS Number: 103-90-2

External links