Optical constants

Refractive index of C₅H₁₀O₂ (Propyl acetate, PAC, IPAC)

Li et al. 2022: isopropyl acetate; n 0.2–1.7 µm

Data: formula 5
Range: 0.2–1.7 µm
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.37619
Extinction coefficient k: 0

Permittivity ε₁: 1.89391
Permittivity ε₂: 0

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

Abbe number V_d: 39.474
Chromatic dispersion dn/dλ: -0.0492136 µm⁻¹

Group index n_g: 1.40511
Group velocity dispersion: 89.7496 fs²/mm

Dispersion parameter D: -489.632 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

# C5H10O2 (Propyl acetate, PAC, IPAC): Li et al. 2022: isopropyl acetate; n 0.2–1.7 µm
c5h10o2 = ls.fetch_refractiveindex("organic", "propyl_acetate", "Li", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c5h10o2.range_nm)  # (200, 1700) nm
eps = c5h10o2.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_ec139a51f903/lightsmith"
c5h10o2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c5h10o2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (propyl-acetate/li-2022).

# ... load c5h10o2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c5h10o2)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=1000, 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 = 1.3616 + 0.00511 λ^{- 2.0} - 3.317 \times 10^{-5} λ^{- 4.0} + 2.958 \times 10^{-6} λ^{- 6.0}

Valid from 0.2 to 1.7 µm.

Coefficients as stored

C_i	Value
C1	1.3616
C2	0.00511
C3	-2.0
C4	-3.317e-05
C5	-4.0
C6	2.958e-06
C7	-6.0

Comments and conditions

Room temperature.

References

X. Li, C. Wang, L. Ma, L. Liu. Ellipsometry-transmission measurement of the complex refractive indices for a series of organic solvents in the 200–1700 nm spectral range. Infrared Phys. Technol. 125, 104313 (2022)

doi:10.1016/j.infrared.2022.104313 Ellipsometry-transmission measurement of the complex refractive indices for a series of organic solvents in the 200–1700 nm spectral range, Infrared Physics & Technology (2022)

Cite

Xiaoning Li, Chengchao Wang, Lanxin Ma and Linhua Liu. Ellipsometry-transmission measurement of the complex refractive indices for a series of organic solvents in the 200–1700 nm spectral range. Infrared Physics & Technology, 125, 104313 (2022), doi:10.1016/j.infrared.2022.104313; 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

C5H10O2 (Propyl acetate, PAC, IPAC), Li et al. 2022: isopropyl acetate; n 0.2–1.7 µm: n and k versus wavelength
λ (µm)	n
0.2	1.514837
0.201076	1.512451
0.202157	1.510116
0.203244	1.507831
0.204337	1.505594
0.205436	1.503405
0.206541	1.501263
0.207652	1.499165
0.208768	1.49711
0.209891	1.495099
0.21102	1.493128
0.212155	1.491198
0.213296	1.489307
0.214443	1.487454
0.215596	1.485638
0.216756	1.483858
0.217921	1.482113
0.219093	1.480402
0.220272	1.478725
0.221456	1.47708
0.222647	1.475467
0.223845	1.473885
0.225049	1.472332
0.226259	1.470809
0.227476	1.469315
0.228699	1.467848
0.229929	1.466408
0.231165	1.464995
0.232409	1.463607
0.233659	1.462244
0.234915	1.460906
0.236179	1.459592
0.237449	1.458301
0.238726	1.457033
0.24001	1.455787
0.2413	1.454563
0.242598	1.453359
0.243903	1.452177
0.245214	1.451014
0.246533	1.449871
0.247859	1.448747
0.249192	1.447642
0.250532	1.446556
0.25188	1.445487
0.253234	1.444436
0.254596	1.443401
0.255965	1.442384
0.257342	1.441383
0.258726	1.440397
0.260117	1.439428
0.261516	1.438473
0.262923	1.437534
0.264337	1.436609
0.265758	1.435698
0.267187	1.434801
0.268624	1.433918
0.270069	1.433048
0.271521	1.432192
0.272982	1.431348
0.27445	1.430517
0.275926	1.429698
0.27741	1.428891
0.278902	1.428096
0.280402	1.427312
0.28191	1.42654
0.283426	1.425779
0.28495	1.425028
0.286482	1.424289
0.288023	1.423559
0.289572	1.42284
0.291129	1.422131
0.292695	1.421432
0.294269	1.420743
0.295852	1.420063
0.297443	1.419392
0.299042	1.41873
0.300651	1.418078
0.302268	1.417434
0.303893	1.416799
0.305527	1.416172
0.307171	1.415553
0.308823	1.414943
0.310483	1.414341
0.312153	1.413746
0.313832	1.41316
0.31552	1.412581
0.317217	1.412009
0.318923	1.411445
0.320638	1.410888
0.322362	1.410338
0.324096	1.409795
0.325839	1.409259
0.327591	1.40873
0.329353	1.408207
0.331124	1.407691
0.332905	1.407181
0.334695	1.406677
0.336495	1.40618
0.338305	1.405689
0.340124	1.405204
0.341954	1.404725
0.343793	1.404251
0.345641	1.403784
0.3475	1.403322
0.349369	1.402865
0.351248	1.402414
0.353137	1.401969
0.355036	1.401529
0.356946	1.401094
0.358865	1.400664
0.360795	1.400239
0.362736	1.399819
0.364686	1.399404
0.366648	1.398994
0.368619	1.398589
0.370602	1.398189
0.372595	1.397793
0.374599	1.397402
0.376613	1.397015
0.378639	1.396633
0.380675	1.396255
0.382722	1.395881
0.384781	1.395512
0.38685	1.395147
0.38893	1.394786
0.391022	1.39443
0.393125	1.394077
0.395239	1.393728
0.397365	1.393383
0.399502	1.393043
0.40165	1.392706
0.40381	1.392372
0.405982	1.392043
0.408166	1.391717
0.410361	1.391395
0.412568	1.391076
0.414786	1.390761
0.417017	1.39045
0.41926	1.390142
0.421515	1.389837
0.423781	1.389536
0.42606	1.389238
0.428352	1.388943
0.430656	1.388652
0.432972	1.388364
0.4353	1.388079
0.437641	1.387797
0.439995	1.387518
0.442361	1.387242
0.44474	1.386969
0.447132	1.3867
0.449537	1.386433
0.451954	1.386169
0.454385	1.385908
0.456828	1.38565
0.459285	1.385394
0.461755	1.385142
0.464239	1.384892
0.466735	1.384645
0.469245	1.3844
0.471769	1.384158
0.474306	1.383919
0.476857	1.383682
0.479421	1.383448
0.482	1.383217
0.484592	1.382987
0.487198	1.382761
0.489818	1.382537
0.492452	1.382315
0.495101	1.382095
0.497763	1.381878
0.50044	1.381663
0.503132	1.381451
0.505838	1.381241
0.508558	1.381033
0.511293	1.380827
0.514043	1.380624
0.516807	1.380422
0.519587	1.380223
0.522381	1.380026
0.52519	1.379831
0.528015	1.379638
0.530854	1.379448
0.533709	1.379259
0.53658	1.379072
0.539465	1.378887
0.542367	1.378704
0.545283	1.378523
0.548216	1.378344
0.551164	1.378167
0.554128	1.377992
0.557109	1.377819
0.560105	1.377647
0.563117	1.377478
0.566145	1.37731
0.56919	1.377144
0.572251	1.376979
0.575329	1.376817
0.578423	1.376656
0.581534	1.376497
0.584661	1.376339
0.587805	1.376183
0.590967	1.376029
0.594145	1.375877
0.59734	1.375726
0.600553	1.375576
0.603782	1.375429
0.607029	1.375282
0.610294	1.375138
0.613576	1.374995
0.616876	1.374853
0.620194	1.374713
0.623529	1.374574
0.626882	1.374437
0.630254	1.374301
0.633643	1.374167
0.637051	1.374034
0.640477	1.373903
0.643921	1.373773
0.647384	1.373644
0.650866	1.373517
0.654366	1.373391
0.657885	1.373266
0.661424	1.373143
0.664981	1.37302
0.668557	1.3729
0.672152	1.37278
0.675767	1.372662
0.679402	1.372545
0.683055	1.372429
0.686729	1.372315
0.690422	1.372201
0.694135	1.372089
0.697868	1.371978
0.701621	1.371868
0.705395	1.37176
0.709188	1.371652
0.713002	1.371546
0.716837	1.371441
0.720692	1.371336
0.724568	1.371233
0.728464	1.371132
0.732382	1.371031
0.736321	1.370931
0.740281	1.370832
0.744262	1.370734
0.748265	1.370638
0.752289	1.370542
0.756335	1.370447
0.760402	1.370354
0.764492	1.370261
0.768603	1.370169
0.772736	1.370079
0.776892	1.369989
0.78107	1.3699
0.785271	1.369812
0.789494	1.369725
0.79374	1.369639
0.798009	1.369554
0.8023	1.36947
0.806615	1.369386
0.810953	1.369304
0.815314	1.369222
0.819699	1.369142
0.824108	1.369062
0.82854	1.368983
0.832995	1.368904
0.837475	1.368827
0.841979	1.36875
0.846507	1.368675
0.85106	1.3686
0.855637	1.368525
0.860238	1.368452
0.864865	1.368379
0.869516	1.368308
0.874192	1.368236
0.878894	1.368166
0.88362	1.368097
0.888372	1.368028
0.89315	1.367959
0.897953	1.367892
0.902783	1.367825
0.907638	1.367759
0.912519	1.367694
0.917427	1.367629
0.92236	1.367565
0.927321	1.367502
0.932308	1.36744
0.937322	1.367378
0.942363	1.367316
0.947431	1.367256
0.952526	1.367196
0.957649	1.367136
0.962799	1.367078
0.967977	1.36702
0.973183	1.366962
0.978416	1.366905
0.983678	1.366849
0.988969	1.366793
0.994287	1.366738
0.999634	1.366683
1.00501	1.36663
1.01042	1.366576
1.01585	1.366523
1.02131	1.366471
1.02681	1.366419
1.03233	1.366368
1.03788	1.366318
1.04346	1.366268
1.04907	1.366218
1.05471	1.366169
1.06039	1.36612
1.06609	1.366072
1.07182	1.366025
1.07759	1.365978
1.08338	1.365931
1.08921	1.365885
1.09507	1.36584
1.10096	1.365795
1.10688	1.36575
1.11283	1.365706
1.11881	1.365663
1.12483	1.365619
1.13088	1.365577
1.13696	1.365535
1.14308	1.365493
1.14922	1.365451
1.1554	1.36541
1.16162	1.36537
1.16787	1.36533
1.17415	1.36529
1.18046	1.365251
1.18681	1.365212
1.19319	1.365174
1.19961	1.365136
1.20606	1.365098
1.21255	1.365061
1.21907	1.365024
1.22562	1.364988
1.23222	1.364952
1.23884	1.364916
1.2455	1.364881
1.2522	1.364846
1.25894	1.364812
1.26571	1.364778
1.27251	1.364744
1.27936	1.36471
1.28624	1.364677
1.29316	1.364645
1.30011	1.364612
1.3071	1.36458
1.31413	1.364548
1.3212	1.364517
1.32831	1.364486
1.33545	1.364455
1.34263	1.364425
1.34985	1.364395
1.35711	1.364365
1.36441	1.364336
1.37175	1.364307
1.37912	1.364278
1.38654	1.364249
1.394	1.364221
1.4015	1.364193
1.40903	1.364166
1.41661	1.364138
1.42423	1.364111
1.43189	1.364085
1.43959	1.364058
1.44733	1.364032
1.45511	1.364006
1.46294	1.363981
1.47081	1.363955
1.47872	1.36393
1.48667	1.363906
1.49467	1.363881
1.5027	1.363857
1.51079	1.363833
1.51891	1.363809
1.52708	1.363785
1.53529	1.363762
1.54355	1.363739
1.55185	1.363716
1.5602	1.363694
1.56859	1.363672
1.57702	1.36365
1.5855	1.363628
1.59403	1.363606
1.6026	1.363585
1.61122	1.363564
1.61989	1.363543
1.6286	1.363522
1.63736	1.363502
1.64616	1.363481
1.65502	1.363461
1.66392	1.363441
1.67286	1.363422
1.68186	1.363402
1.69091	1.363383
1.7	1.363364

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: —

C₅H₁₀O₂ (Propyl acetate, PAC, IPAC): all datasets

Li et al. 2022: isopropyl acetate; n 0.2–1.7 µm n 0.2–1.7 µm default

About C5H10O2 (Propyl acetate, PAC, IPAC)

Propyl acetate (C₅H₁₀O₂) is a colorless, flammable liquid with a pleasant, fruity odor similar to pears. It is an ester formed from the reaction of propanol and acetic acid. Propyl acetate exists in two isomeric forms: n-propyl acetate and isopropyl acetate. Both isomers are used as solvents in coatings, inks, adhesives, and fragrances due to their effective solvency and fast evaporation rates. n-Propyl acetate has the structure CH₃-COO-CH₂-CH₂-CH₃, where the acetate group is attached to a primary carbon atom. Chemical formula: CH₃-COO-CH₂-CH₂-CH₃ Isopropyl acetate has the structure CH₃-COO-CH(CH₃)₂, where the acetate group is attached to a secondary carbon atom. Chemical formula: CH₃-COO-CH(CH₃)₂

More about C5H10O2 (Propyl acetate, PAC, IPAC) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C5H10O2 - propyl acetate/nk/Li.yml
ID: ds_ec139a51f903
API: /v1/datasets/ds_ec139a51f903

Plot