Optical constants

Refractive index of C₄H₈O₂ (Ethyl acetate, EtOAc, EA)

Kozma et al. 2005: n 0.248–0.641 µm

Data: formula 5
Range: 0.2484–0.6407 µm
Temperature: 295 K
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.37585
Extinction coefficient k: 0

Permittivity ε₁: 1.89297
Permittivity ε₂: 0

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

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.0329537 µm⁻¹

Group index n_g: 1.39522
Group velocity dispersion: 61.26 fs²/mm

Dispersion parameter D: -334.206 ps/(nm·km)
Photon energy: 2.11001 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

# C4H8O2 (Ethyl acetate, EtOAc, EA): Kozma et al. 2005: n 0.248–0.641 µm
c4h8o2 = ls.fetch_refractiveindex("organic", "ethyl_acetate", "Kozma", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c4h8o2.range_nm)  # (248.4, 640.7) nm
eps = c4h8o2.eps([633])  # 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_8e3c46b36053/lightsmith"
c4h8o2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c4h8o2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (ethyl-acetate/kozma-2005).

# ... load c4h8o2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c4h8o2)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=640, 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 = 1.3662 + 0.0033477 λ^{- 2.0} - 1.3323046 \times 10^{-5} λ^{- 4.0} + 2.87492 \times 10^{-6} λ^{- 6.0}

Valid from 0.2484 to 0.6407 µm.

Coefficients as stored

C_i	Value
C1	1.3662
C2	0.0033477
C3	-2.0
C4	-1.3323046e-05
C5	-4.0
C6	2.87492e-06
C7	-6.0

Comments and conditions

22 °C

Conditions

temperature: 295 K

References

I. Z. Kozma, P. Krok, E. Riedle. Direct measurement of the group-velocity mismatch and derivation of the refractive-index dispersion for a variety of solvents in the ultraviolet. J. Opt. Soc. Am. B 22, 1479-1485 (2005)

doi:10.1364/josab.22.001479 Direct measurement of the group-velocity mismatch and derivation of the refractive-index dispersion for a variety of solvents in the ultraviolet, Journal of the Optical Society of America B (2005)

Cite

Ida Z. Kozma, Patrizia Krok and Eberhard Riedle. Direct measurement of the group-velocity mismatch and derivation of the refractive-index dispersion for a variety of solvents in the ultraviolet. Journal of the Optical Society of America B, 22, 1479 (2005), doi:10.1364/josab.22.001479; 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

C4H8O2 (Ethyl acetate, EtOAc, EA), Kozma et al. 2005: n 0.248–0.641 µm: n and k versus wavelength
λ (µm)	n
0.2484	1.429194
0.248991	1.428797
0.249583	1.428403
0.250176	1.428013
0.250771	1.427626
0.251367	1.427242
0.251965	1.426861
0.252564	1.426483
0.253164	1.426109
0.253766	1.425738
0.254369	1.425369
0.254974	1.425004
0.25558	1.424642
0.256188	1.424283
0.256797	1.423926
0.257408	1.423573
0.25802	1.423223
0.258633	1.422875
0.259248	1.42253
0.259865	1.422188
0.260482	1.421849
0.261102	1.421512
0.261722	1.421178
0.262345	1.420847
0.262968	1.420518
0.263594	1.420192
0.26422	1.419869
0.264849	1.419548
0.265478	1.419229
0.266109	1.418913
0.266742	1.4186
0.267376	1.418289
0.268012	1.41798
0.268649	1.417674
0.269288	1.417371
0.269928	1.417069
0.27057	1.41677
0.271213	1.416473
0.271858	1.416179
0.272505	1.415886
0.273152	1.415596
0.273802	1.415308
0.274453	1.415023
0.275105	1.414739
0.275759	1.414458
0.276415	1.414178
0.277072	1.413901
0.277731	1.413626
0.278391	1.413353
0.279053	1.413082
0.279717	1.412813
0.280382	1.412546
0.281048	1.412281
0.281717	1.412017
0.282386	1.411756
0.283058	1.411497
0.283731	1.411239
0.284405	1.410984
0.285082	1.41073
0.285759	1.410478
0.286439	1.410228
0.28712	1.40998
0.287802	1.409733
0.288487	1.409489
0.289173	1.409246
0.28986	1.409005
0.290549	1.408765
0.29124	1.408527
0.291933	1.408291
0.292627	1.408057
0.293322	1.407824
0.29402	1.407592
0.294719	1.407363
0.295419	1.407135
0.296122	1.406909
0.296826	1.406684
0.297532	1.40646
0.298239	1.406239
0.298948	1.406018
0.299659	1.4058
0.300371	1.405583
0.301085	1.405367
0.301801	1.405153
0.302519	1.40494
0.303238	1.404728
0.303959	1.404519
0.304682	1.40431
0.305406	1.404103
0.306132	1.403897
0.30686	1.403693
0.30759	1.40349
0.308321	1.403288
0.309054	1.403088
0.309789	1.402889
0.310525	1.402691
0.311264	1.402495
0.312004	1.4023
0.312746	1.402106
0.313489	1.401914
0.314235	1.401723
0.314982	1.401533
0.315731	1.401344
0.316481	1.401157
0.317234	1.40097
0.317988	1.400785
0.318744	1.400601
0.319502	1.400419
0.320261	1.400237
0.321023	1.400057
0.321786	1.399877
0.322551	1.399699
0.323318	1.399522
0.324087	1.399347
0.324857	1.399172
0.32563	1.398998
0.326404	1.398826
0.32718	1.398654
0.327958	1.398484
0.328738	1.398315
0.329519	1.398146
0.330303	1.397979
0.331088	1.397813
0.331875	1.397648
0.332664	1.397484
0.333455	1.397321
0.334248	1.397159
0.335043	1.396998
0.335839	1.396838
0.336638	1.396679
0.337438	1.396521
0.33824	1.396363
0.339044	1.396207
0.339851	1.396052
0.340659	1.395898
0.341468	1.395744
0.34228	1.395592
0.343094	1.39544
0.34391	1.39529
0.344728	1.39514
0.345547	1.394991
0.346369	1.394843
0.347192	1.394696
0.348018	1.39455
0.348845	1.394405
0.349675	1.394261
0.350506	1.394117
0.351339	1.393974
0.352175	1.393832
0.353012	1.393691
0.353851	1.393551
0.354693	1.393412
0.355536	1.393273
0.356381	1.393136
0.357228	1.392999
0.358078	1.392863
0.358929	1.392727
0.359782	1.392593
0.360638	1.392459
0.361495	1.392326
0.362355	1.392194
0.363216	1.392062
0.36408	1.391931
0.364946	1.391801
0.365813	1.391672
0.366683	1.391544
0.367555	1.391416
0.368429	1.391289
0.369305	1.391163
0.370183	1.391037
0.371063	1.390912
0.371945	1.390788
0.372829	1.390665
0.373716	1.390542
0.374604	1.39042
0.375495	1.390299
0.376388	1.390178
0.377283	1.390058
0.37818	1.389939
0.379079	1.38982
0.37998	1.389702
0.380883	1.389585
0.381789	1.389468
0.382697	1.389352
0.383607	1.389237
0.384519	1.389122
0.385433	1.389008
0.386349	1.388894
0.387268	1.388781
0.388189	1.388669
0.389112	1.388558
0.390037	1.388447
0.390964	1.388336
0.391894	1.388226
0.392825	1.388117
0.393759	1.388009
0.394695	1.387901
0.395634	1.387793
0.396575	1.387687
0.397517	1.38758
0.398463	1.387475
0.39941	1.38737
0.40036	1.387265
0.401311	1.387161
0.402266	1.387058
0.403222	1.386955
0.404181	1.386853
0.405142	1.386751
0.406105	1.38665
0.40707	1.386549
0.408038	1.386449
0.409008	1.38635
0.409981	1.386251
0.410956	1.386152
0.411933	1.386054
0.412912	1.385957
0.413894	1.38586
0.414878	1.385763
0.415864	1.385668
0.416853	1.385572
0.417844	1.385477
0.418837	1.385383
0.419833	1.385289
0.420831	1.385196
0.421832	1.385103
0.422835	1.385011
0.42384	1.384919
0.424848	1.384827
0.425858	1.384736
0.426871	1.384646
0.427886	1.384556
0.428903	1.384466
0.429923	1.384377
0.430945	1.384289
0.431969	1.384201
0.432996	1.384113
0.434026	1.384026
0.435058	1.383939
0.436092	1.383853
0.437129	1.383767
0.438168	1.383682
0.43921	1.383597
0.440254	1.383512
0.441301	1.383428
0.44235	1.383344
0.443402	1.383261
0.444456	1.383178
0.445513	1.383096
0.446572	1.383014
0.447634	1.382933
0.448698	1.382852
0.449765	1.382771
0.450834	1.382691
0.451906	1.382611
0.452981	1.382531
0.454058	1.382452
0.455137	1.382374
0.456219	1.382295
0.457304	1.382218
0.458391	1.38214
0.459481	1.382063
0.460574	1.381987
0.461669	1.38191
0.462766	1.381835
0.463866	1.381759
0.464969	1.381684
0.466075	1.381609
0.467183	1.381535
0.468294	1.381461
0.469407	1.381387
0.470523	1.381314
0.471642	1.381241
0.472763	1.381169
0.473887	1.381097
0.475014	1.381025
0.476143	1.380954
0.477275	1.380883
0.47841	1.380812
0.479548	1.380742
0.480688	1.380672
0.481831	1.380602
0.482976	1.380533
0.484124	1.380464
0.485276	1.380396
0.486429	1.380327
0.487586	1.38026
0.488745	1.380192
0.489907	1.380125
0.491072	1.380058
0.492239	1.379992
0.49341	1.379925
0.494583	1.37986
0.495759	1.379794
0.496937	1.379729
0.498119	1.379664
0.499303	1.379599
0.50049	1.379535
0.50168	1.379471
0.502873	1.379408
0.504069	1.379344
0.505267	1.379281
0.506469	1.379219
0.507673	1.379156
0.50888	1.379094
0.51009	1.379033
0.511302	1.378971
0.512518	1.37891
0.513737	1.378849
0.514958	1.378789
0.516182	1.378729
0.51741	1.378669
0.51864	1.378609
0.519873	1.37855
0.521109	1.378491
0.522348	1.378432
0.52359	1.378374
0.524835	1.378315
0.526082	1.378258
0.527333	1.3782
0.528587	1.378143
0.529844	1.378086
0.531104	1.378029
0.532366	1.377972
0.533632	1.377916
0.534901	1.37786
0.536172	1.377805
0.537447	1.377749
0.538725	1.377694
0.540006	1.377639
0.54129	1.377585
0.542577	1.377531
0.543867	1.377477
0.54516	1.377423
0.546456	1.377369
0.547755	1.377316
0.549058	1.377263
0.550363	1.37721
0.551671	1.377158
0.552983	1.377106
0.554298	1.377054
0.555616	1.377002
0.556937	1.376951
0.558261	1.376899
0.559588	1.376849
0.560919	1.376798
0.562252	1.376747
0.563589	1.376697
0.564929	1.376647
0.566272	1.376598
0.567619	1.376548
0.568968	1.376499
0.570321	1.37645
0.571677	1.376401
0.573036	1.376353
0.574398	1.376304
0.575764	1.376256
0.577133	1.376208
0.578505	1.376161
0.579881	1.376113
0.581259	1.376066
0.582641	1.376019
0.584027	1.375973
0.585415	1.375926
0.586807	1.37588
0.588202	1.375834
0.589601	1.375788
0.591002	1.375743
0.592408	1.375697
0.593816	1.375652
0.595228	1.375607
0.596643	1.375563
0.598062	1.375518
0.599484	1.375474
0.600909	1.37543
0.602338	1.375386
0.60377	1.375342
0.605205	1.375299
0.606644	1.375256
0.608086	1.375213
0.609532	1.37517
0.610981	1.375128
0.612434	1.375085
0.61389	1.375043
0.61535	1.375001
0.616813	1.374959
0.618279	1.374918
0.619749	1.374876
0.621223	1.374835
0.6227	1.374794
0.62418	1.374753
0.625664	1.374713
0.627152	1.374673
0.628643	1.374632
0.630138	1.374592
0.631636	1.374553
0.633138	1.374513
0.634643	1.374474
0.636152	1.374434
0.637664	1.374395
0.63918	1.374356
0.6407	1.374318

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: —

C₄H₈O₂ (Ethyl acetate, EtOAc, EA): all datasets

About C4H8O2 (Ethyl acetate, EtOAc, EA)

Ethyl acetate (C₄H₈O₂, EtOAc, EA) is a colorless, volatile liquid with a sweet, fruity odor reminiscent of pear drops. As a medium-polarity solvent, it finds use in a variety of industries, especially in the manufacture of inks, adhesives, and coatings. It's frequently employed as a solvent for extractions in laboratory procedures and in the production of varnishes and nail polish removers. Additionally, due to its pleasant smell, ethyl acetate is occasionally used in the formulation of perfumes and as a flavoring agent in food products. Chemical formula: CH₃-COO-CH₂-CH₃

More about C4H8O2 (Ethyl acetate, EtOAc, EA) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C4H8O2 - ethyl acetate/nk/Kozma.yml
ID: ds_8e3c46b36053
API: /v1/datasets/ds_8e3c46b36053

Plot