Optical constants

Refractive index of C₈H₉NO₂ (Acetaminophen)

Juntunen et al. 2024: n 1.10–1.65 µm

Data: formula 5
Range: 1.1–1.65 µm
Temperature: 296 K
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.62289
Extinction coefficient k: 0

Permittivity ε₁: 2.63378
Permittivity ε₂: 0

Absorption coefficient α: 0 cm⁻¹
Penetration depth δ = λ/(2πk): — nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.00174503 µm⁻¹

Group index n_g: 1.62525
Group velocity dispersion: 22.3771 fs²/mm

Dispersion parameter D: -23.1279 ps/(nm·km)
Photon energy: 0.918401 eV

ε = (n + ik)², α = 4πk/λ, n_g = n − λ dn/dλ, GVD = λ³/(2πc²) d²n/dλ², D = −(λ/c) d²n/dλ². Group-velocity dispersion is given for formula data only.

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# C8H9NO2 (Acetaminophen): Juntunen et al. 2024: n 1.10–1.65 µm
c8h9no2 = ls.fetch_refractiveindex("organic", "acetaminophen", "Juntunen", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c8h9no2.range_nm)  # (1100, 1650) nm
eps = c8h9no2.eps([1350])  # complex permittivity

Downloads the original record once (pinned to the imported snapshot) and caches it.

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_8551fc2df95a/lightsmith"
c8h9no2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c8h9no2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (acetaminophen/juntunen-2024).

# ... load c8h9no2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c8h9no2)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=1100, stop_nm=1650, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength

Same spec runs with DDA, FDTD, BEM or T-matrix: ls.compare(sim, ["mie", "dda"]).

Materials guide Open a sphere of it in Studio Quick start Ask the community

Lightsmith is open source (MIT): Mie, T-matrix, BEM, DDA, FDTD, RCWA, TMM, mode solvers and inverse design behind one spec, on CPU or GPU. GitHub.

Dispersion formula

Cauchy (formula 5), λ in µm

n = 1.622 + 0.001102 λ^{- 2.0} + 0.000952 λ^{- 4.0}

Valid from 1.1 to 1.65 µm.

Coefficients as stored

C_i	Value
C1	1.622
C2	0.001102
C3	-2.0
C4	0.000952
C5	-4.0

Comments and conditions

Avicel PH102 microcrystalline cellulose. Powder. 23 °C

Conditions

temperature: 296 K

References

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)

doi:10.1016/j.powtec.2024.119621 Refractive index measurement of pharmaceutical powders in the short-wave infrared range using index matching assisted with phase imaging, Powder Technology (2024)

Cite

Cory Juntunen, Adam J. Rish, Carl A. Anderson and Yongjin Sung. Refractive index measurement of pharmaceutical powders in the short-wave infrared range using index matching assisted with phase imaging. Powder Technology, 438, 119621 (2024), doi:10.1016/j.powtec.2024.119621; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

Computed on 400 wavelengths, the same grid as the API and the library

CSV comma separated TXT tab separated YAML n, k Full database record original YAML All quantities CSV JSON metadata

C8H9NO2 (Acetaminophen), Juntunen et al. 2024: n 1.10–1.65 µm: n and k versus wavelength
λ (µm)	n
1.1	1.623561
1.10112	1.623556
1.10224	1.623552
1.10336	1.623548
1.10448	1.623543
1.1056	1.623539
1.10673	1.623534
1.10785	1.62353
1.10898	1.623525
1.11011	1.623521
1.11124	1.623517
1.11237	1.623512
1.1135	1.623508
1.11463	1.623504
1.11576	1.623499
1.1169	1.623495
1.11803	1.623491
1.11917	1.623487
1.12031	1.623482
1.12145	1.623478
1.12259	1.623474
1.12373	1.62347
1.12487	1.623466
1.12601	1.623461
1.12716	1.623457
1.1283	1.623453
1.12945	1.623449
1.1306	1.623445
1.13175	1.623441
1.1329	1.623437
1.13405	1.623432
1.1352	1.623428
1.13636	1.623424
1.13751	1.62342
1.13867	1.623416
1.13983	1.623412
1.14099	1.623408
1.14215	1.623404
1.14331	1.6234
1.14447	1.623396
1.14563	1.623392
1.1468	1.623388
1.14796	1.623384
1.14913	1.62338
1.1503	1.623377
1.15147	1.623373
1.15264	1.623369
1.15381	1.623365
1.15499	1.623361
1.15616	1.623357
1.15734	1.623353
1.15851	1.62335
1.15969	1.623346
1.16087	1.623342
1.16205	1.623338
1.16323	1.623334
1.16441	1.623331
1.1656	1.623327
1.16678	1.623323
1.16797	1.623319
1.16916	1.623316
1.17035	1.623312
1.17153	1.623308
1.17273	1.623305
1.17392	1.623301
1.17511	1.623297
1.17631	1.623294
1.1775	1.62329
1.1787	1.623286
1.1799	1.623283
1.1811	1.623279
1.1823	1.623276
1.1835	1.623272
1.1847	1.623268
1.18591	1.623265
1.18711	1.623261
1.18832	1.623258
1.18953	1.623254
1.19074	1.623251
1.19195	1.623247
1.19316	1.623244
1.19437	1.62324
1.19559	1.623237
1.1968	1.623233
1.19802	1.62323
1.19924	1.623227
1.20046	1.623223
1.20168	1.62322
1.2029	1.623216
1.20412	1.623213
1.20535	1.62321
1.20657	1.623206
1.2078	1.623203
1.20903	1.623199
1.21026	1.623196
1.21149	1.623193
1.21272	1.623189
1.21395	1.623186
1.21519	1.623183
1.21642	1.62318
1.21766	1.623176
1.2189	1.623173
1.22014	1.62317
1.22138	1.623167
1.22262	1.623163
1.22386	1.62316
1.22511	1.623157
1.22635	1.623154
1.2276	1.62315
1.22885	1.623147
1.2301	1.623144
1.23135	1.623141
1.2326	1.623138
1.23385	1.623135
1.23511	1.623131
1.23636	1.623128
1.23762	1.623125
1.23888	1.623122
1.24014	1.623119
1.2414	1.623116
1.24266	1.623113
1.24392	1.62311
1.24519	1.623107
1.24645	1.623104
1.24772	1.623101
1.24899	1.623098
1.25026	1.623095
1.25153	1.623092
1.2528	1.623089
1.25408	1.623086
1.25535	1.623083
1.25663	1.62308
1.25791	1.623077
1.25919	1.623074
1.26047	1.623071
1.26175	1.623068
1.26303	1.623065
1.26431	1.623062
1.2656	1.623059
1.26689	1.623056
1.26817	1.623053
1.26946	1.62305
1.27075	1.623048
1.27205	1.623045
1.27334	1.623042
1.27463	1.623039
1.27593	1.623036
1.27723	1.623033
1.27853	1.62303
1.27983	1.623028
1.28113	1.623025
1.28243	1.623022
1.28373	1.623019
1.28504	1.623016
1.28635	1.623014
1.28765	1.623011
1.28896	1.623008
1.29027	1.623005
1.29159	1.623003
1.2929	1.623
1.29421	1.622997
1.29553	1.622995
1.29685	1.622992
1.29816	1.622989
1.29948	1.622986
1.30081	1.622984
1.30213	1.622981
1.30345	1.622978
1.30478	1.622976
1.3061	1.622973
1.30743	1.62297
1.30876	1.622968
1.31009	1.622965
1.31142	1.622963
1.31276	1.62296
1.31409	1.622957
1.31543	1.622955
1.31677	1.622952
1.3181	1.62295
1.31944	1.622947
1.32079	1.622945
1.32213	1.622942
1.32347	1.622939
1.32482	1.622937
1.32617	1.622934
1.32751	1.622932
1.32886	1.622929
1.33021	1.622927
1.33157	1.622924
1.33292	1.622922
1.33428	1.622919
1.33563	1.622917
1.33699	1.622914
1.33835	1.622912
1.33971	1.62291
1.34107	1.622907
1.34244	1.622905
1.3438	1.622902
1.34517	1.6229
1.34654	1.622897
1.3479	1.622895
1.34927	1.622893
1.35065	1.62289
1.35202	1.622888
1.35339	1.622885
1.35477	1.622883
1.35615	1.622881
1.35753	1.622878
1.35891	1.622876
1.36029	1.622874
1.36167	1.622871
1.36306	1.622869
1.36444	1.622867
1.36583	1.622864
1.36722	1.622862
1.36861	1.62286
1.37	1.622857
1.37139	1.622855
1.37279	1.622853
1.37418	1.622851
1.37558	1.622848
1.37698	1.622846
1.37838	1.622844
1.37978	1.622842
1.38118	1.622839
1.38259	1.622837
1.38399	1.622835
1.3854	1.622833
1.38681	1.62283
1.38822	1.622828
1.38963	1.622826
1.39104	1.622824
1.39246	1.622822
1.39387	1.622819
1.39529	1.622817
1.39671	1.622815
1.39813	1.622813
1.39955	1.622811
1.40097	1.622809
1.4024	1.622806
1.40382	1.622804
1.40525	1.622802
1.40668	1.6228
1.40811	1.622798
1.40954	1.622796
1.41097	1.622794
1.41241	1.622792
1.41384	1.62279
1.41528	1.622787
1.41672	1.622785
1.41816	1.622783
1.4196	1.622781
1.42105	1.622779
1.42249	1.622777
1.42394	1.622775
1.42539	1.622773
1.42683	1.622771
1.42828	1.622769
1.42974	1.622767
1.43119	1.622765
1.43265	1.622763
1.4341	1.622761
1.43556	1.622759
1.43702	1.622757
1.43848	1.622755
1.43994	1.622753
1.44141	1.622751
1.44287	1.622749
1.44434	1.622747
1.44581	1.622745
1.44728	1.622743
1.44875	1.622741
1.45022	1.622739
1.4517	1.622737
1.45317	1.622735
1.45465	1.622733
1.45613	1.622731
1.45761	1.62273
1.45909	1.622728
1.46058	1.622726
1.46206	1.622724
1.46355	1.622722
1.46504	1.62272
1.46653	1.622718
1.46802	1.622716
1.46951	1.622714
1.471	1.622713
1.4725	1.622711
1.474	1.622709
1.47549	1.622707
1.47699	1.622705
1.4785	1.622703
1.48	1.622702
1.4815	1.6227
1.48301	1.622698
1.48452	1.622696
1.48603	1.622694
1.48754	1.622692
1.48905	1.622691
1.49056	1.622689
1.49208	1.622687
1.4936	1.622685
1.49512	1.622684
1.49664	1.622682
1.49816	1.62268
1.49968	1.622678
1.50121	1.622676
1.50273	1.622675
1.50426	1.622673
1.50579	1.622671
1.50732	1.622669
1.50885	1.622668
1.51039	1.622666
1.51192	1.622664
1.51346	1.622663
1.515	1.622661
1.51654	1.622659
1.51808	1.622657
1.51962	1.622656
1.52117	1.622654
1.52272	1.622652
1.52426	1.622651
1.52581	1.622649
1.52736	1.622647
1.52892	1.622646
1.53047	1.622644
1.53203	1.622642
1.53359	1.622641
1.53515	1.622639
1.53671	1.622637
1.53827	1.622636
1.53983	1.622634
1.5414	1.622632
1.54296	1.622631
1.54453	1.622629
1.5461	1.622628
1.54768	1.622626
1.54925	1.622624
1.55082	1.622623
1.5524	1.622621
1.55398	1.62262
1.55556	1.622618
1.55714	1.622616
1.55872	1.622615
1.56031	1.622613
1.5619	1.622612
1.56348	1.62261
1.56507	1.622609
1.56666	1.622607
1.56826	1.622605
1.56985	1.622604
1.57145	1.622602
1.57305	1.622601
1.57465	1.622599
1.57625	1.622598
1.57785	1.622596
1.57945	1.622595
1.58106	1.622593
1.58267	1.622592
1.58428	1.62259
1.58589	1.622589
1.5875	1.622587
1.58911	1.622586
1.59073	1.622584
1.59235	1.622583
1.59396	1.622581
1.59559	1.62258
1.59721	1.622578
1.59883	1.622577
1.60046	1.622575
1.60208	1.622574
1.60371	1.622572
1.60534	1.622571
1.60698	1.622569
1.60861	1.622568
1.61025	1.622567
1.61188	1.622565
1.61352	1.622564
1.61516	1.622562
1.6168	1.622561
1.61845	1.622559
1.62009	1.622558
1.62174	1.622557
1.62339	1.622555
1.62504	1.622554
1.62669	1.622552
1.62835	1.622551
1.63	1.62255
1.63166	1.622548
1.63332	1.622547
1.63498	1.622545
1.63664	1.622544
1.6383	1.622543
1.63997	1.622541
1.64164	1.62254
1.64331	1.622539
1.64498	1.622537
1.64665	1.622536
1.64832	1.622535
1.65	1.622533

Optical transmission calculator

Free-standing sample in vacuum, normal incidence

Transmittance T: —
Reflectance R: —

Fresnel reflection calculator

R_p: —
R_s: —
R = (R_p+R_s)/2: —
Phase φ_p: —
Phase φ_s: —
Brewster angle θ_B: —
Critical angle θ_C: —

C₈H₉NO₂ (Acetaminophen): all datasets

Juntunen et al. 2024: n 1.10–1.65 µm n 1.1–1.65 µm default

About C8H9NO2 (Acetaminophen)

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.

More about C8H9NO2 (Acetaminophen) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C8H9NO2 - acetaminophen/nk/Juntunen.yml
ID: ds_8551fc2df95a
API: /v1/datasets/ds_8551fc2df95a

Plot