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Perchloric Acid Chemical Resistance

Resistance ratings for 24 plastics, elastomers and metals at 20 °C and 50 °C. Listed at 2 concentrations, because the rating depends on it.

At a glance

Based on the row for 70 %, 20 °C.

Rated A, very good resistance
PTFE, PVDF, Viton (FPM), FEP, ECTFE/ETFE (5)
Rated B, good resistance
HDPE, Polystyrene, PMP (3)
Rated C, limited resistance
PVC Rigid, EPDM, LDPE (3)
Rated D, not resistant
PP, NBR, Aluminium, Nylon (PA), Acetal (POM), Polycarbonate, PVC Flexible, Polysulfone, PETG (9)
No data in the source
SS 316, SS 304, Silicone, SAN
Rated lower at 50 °C than at 20 °C
HDPE (B → D), PVC Rigid (C → D), LDPE (C → D), ECTFE/ETFE (A → B), Polystyrene (B → C), PMP (B → D)
Rating changes with concentration (20 °C)
PP: A (20 %), D (70 %); PVC Rigid: A (20 %), C (70 %); EPDM: B (20 %), C (70 %); LDPE: A (20 %), C (70 %); Polycarbonate: C (20 %), D (70 %); PVC Flexible: C (20 %), D (70 %)

Based on the row for 70 %, 20 °C.

Rating profile by material family

Perchloric Acid: Rating profile by material familyThermoplastics: 3 B, 2 C, 7 D, 1 no data. Fluoropolymers: 4 A. Elastomers: 1 A, 1 C, 1 D, 1 no data. Metals: 1 D, 2 no data.Thermoplastics (13)Thermoplastics: 3 × B, good resistance (HDPE, PMP, Polystyrene)B 3Thermoplastics: 2 × C, limited resistance (LDPE, PVC Rigid)C 2Thermoplastics: 7 × D, not resistant (PP, PVC Flexible, Polycarbonate, PETG, Acetal (POM), Nylon (PA), Polysulfone)D 7Thermoplastics: 1 × no data (SAN)Fluoropolymers (4)Fluoropolymers: 4 × A, very good resistance (PTFE, FEP, PVDF, ECTFE/ETFE)A 4Elastomers (4)Elastomers: 1 × A, very good resistance (Viton (FPM))A 1Elastomers: 1 × C, limited resistance (EPDM)C 1Elastomers: 1 × D, not resistant (NBR)D 1Elastomers: 1 × no data (Silicone)– 1Metals (3)Metals: 1 × D, not resistant (Aluminium)D 1Metals: 2 × no data (SS 316, SS 304)– 2
A very good resistanceB good resistanceC limited resistanceD not resistantno data
Number of materials in each family with each rating at 20 °C.

Effect of temperature, 20 °C to 50 °C

Perchloric Acid: Effect of temperature, 20 °C to 50 °CHDPE B → D; LDPE C → D; PVC Rigid C → D; PMP B → D; Polystyrene B → C; ECTFE/ETFE A → B.ABCDHDPE: B at 20 °C, D at 50 °CHDPELDPE: C at 20 °C, D at 50 °CLDPEPVC Rigid: C at 20 °C, D at 50 °CPVC RigidPMP: B at 20 °C, D at 50 °CPMPPolystyrene: B at 20 °C, C at 50 °CPolystyreneECTFE/ETFE: A at 20 °C, B at 50 °CECTFE/ETFE
20 °C50 °C
Materials whose rating differs between 20 °C and 50 °C. Materials not shown keep their rating or have no 50 °C value.

Substance

CAS number
7601-90-3
Formula
HClO4
Hazard symbols in the source
E (explosive), O (oxidising), C (corrosive) (pre-GHS European symbols; check the current safety data sheet)
Concentrations listed
20 %; 70 %
Name in the source (German)
Perchlorsäure

Rating by concentration

Perchloric Acid: Rating by concentrationHDPE: 20 % –, 70 % B→D. LDPE: 20 % A→C, 70 % C→D. PP: 20 % A→C, 70 % D. PVC Rigid: 20 % A→C, 70 % C→D. PVC Flexible: 20 % C, 70 % D. PMP: 20 % –, 70 % B→D. Polystyrene: 20 % –, 70 % B→C. Polycarbonate: 20 % C, 70 % D. PETG: 20 % –, 70 % D*. Acetal (POM): 20 % D, 70 % D. Nylon (PA): 20 % D, 70 % D. Polysulfone: 20 % –, 70 % D. PTFE: 20 % A, 70 % A. FEP: 20 % A, 70 % A. PVDF: 20 % A, 70 % A. ECTFE/ETFE: 20 % –, 70 % A→B. EPDM: 20 % B, 70 % C. Viton (FPM): 20 % A, 70 % A. NBR: 20 % D, 70 % D. Aluminium: 20 % D, 70 % D.20 %70 %THERMOPLASTICSHDPEHDPE, 20 %: no data–HDPE, 70 %: B at 20 °C, D at 50 °CB→DLDPELDPE, 20 %: A at 20 °C, C at 50 °CA→CLDPE, 70 %: C at 20 °C, D at 50 °CC→DPPPP, 20 %: A at 20 °C, C at 50 °CA→CPP, 70 %: D at 20 °C, D at 50 °CDPVC RigidPVC Rigid, 20 %: A at 20 °C, C at 50 °CA→CPVC Rigid, 70 %: C at 20 °C, D at 50 °CC→DPVC FlexiblePVC Flexible, 20 %: C at 20 °CCPVC Flexible, 70 %: D at 20 °C, D at 50 °CDPMPPMP, 20 %: no data–PMP, 70 %: B at 20 °C, D at 50 °CB→DPolystyrenePolystyrene, 20 %: no data–Polystyrene, 70 %: B at 20 °C, C at 50 °CB→CPolycarbonatePolycarbonate, 20 %: C at 20 °CCPolycarbonate, 70 %: D at 20 °C, D at 50 °CDPETGPETG, 20 %: no data–PETG, 70 %: D at 20 °C (estimate)D*Acetal (POM)Acetal (POM), 20 %: D at 20 °C, D at 50 °CDAcetal (POM), 70 %: D at 20 °C, D at 50 °CDNylon (PA)Nylon (PA), 20 %: D at 20 °C, D at 50 °CDNylon (PA), 70 %: D at 20 °C, D at 50 °CDPolysulfonePolysulfone, 20 %: no data–Polysulfone, 70 %: D at 20 °C, D at 50 °CDFLUOROPOLYMERSPTFEPTFE, 20 %: A at 20 °C, A at 50 °CAPTFE, 70 %: A at 20 °C, A at 50 °CAFEPFEP, 20 %: A at 20 °C, A at 50 °CAFEP, 70 %: A at 20 °C, A at 50 °CAPVDFPVDF, 20 %: A at 20 °C, A at 50 °CAPVDF, 70 %: A at 20 °C, A at 50 °CAECTFE/ETFEECTFE/ETFE, 20 %: no data–ECTFE/ETFE, 70 %: A at 20 °C, B at 50 °CA→BELASTOMERSEPDMEPDM, 20 %: B at 20 °CBEPDM, 70 %: C at 20 °CCViton (FPM)Viton (FPM), 20 %: A at 20 °C, A at 50 °CAViton (FPM), 70 %: A at 20 °C, A at 50 °CANBRNBR, 20 %: D at 20 °C, D at 50 °CDNBR, 70 %: D at 20 °C, D at 50 °CDMETALSAluminiumAluminium, 20 %: D at 20 °C, D at 50 °CDAluminium, 70 %: D at 20 °C, D at 50 °CD
A very good resistanceB good resistanceC limited resistanceD not resistantno data
Each cell shows the rating at 20 °C. Where the rating at 50 °C differs, it follows the arrow. * marks an estimate in the source.
Show as a table
Material20 %70 %
Thermoplastics
HDPE–B
LDPEAC
PPAD
PVC RigidAC
PVC FlexibleCD
PMP–B
Polystyrene–B
SAN––
PolycarbonateCD
PETG–D*
Acetal (POM)DD
Nylon (PA)DD
Polysulfone–D
Fluoropolymers
PTFEAA
FEPAA
PVDFAA
ECTFE/ETFE–A
Elastomers
EPDMBC
Viton (FPM)AA
NBRDD
Silicone––
Metals
SS 316––
SS 304––
AluminiumDD

* estimated rating, given in the source without a temperature

Resistance table: Perchloric Acid, 20 %

Material20 °C50 °CRemark
Thermoplastics
LDPEAC
PPAC
PVC RigidAC
PVC FlexibleC–
PolycarbonateC–
Acetal (POM)DD
Nylon (PA)DD
Fluoropolymers
PTFEAA
FEPAA
PVDFAA
Elastomers
EPDMB–
Viton (FPM)AA
NBRDD
Metals
AluminiumDD

Not rated in the source, so not in the table: HDPE, PMP, Polystyrene, SAN, PETG, Polysulfone, ECTFE/ETFE, Silicone, SS 316, SS 304

Resistance table: Perchloric Acid, 70 %

Material20 °C50 °CRemark
Thermoplastics
HDPEBD
LDPECD
PPDD
PVC RigidCD
PVC FlexibleDD
PMPBD
PolystyreneBC
PolycarbonateDD
PETGD*–
Acetal (POM)DD
Nylon (PA)DD
PolysulfoneDD
Fluoropolymers
PTFEAA
FEPAA
PVDFAA
ECTFE/ETFEAB
Elastomers
EPDMC–
Viton (FPM)AA
NBRDD
Metals
AluminiumDD

* estimated rating, given in the source without a temperature

Not rated in the source, so not in the table: SAN, Silicone, SS 316, SS 304

Rating scale

A rating marked * is an estimate in the source, not a test result. An estimate is given as one value without a temperature.

Frequently Asked Questions

Which materials resist Perchloric Acid at high concentrations?

The materials with an A rating (resistant) for Perchloric Acid at 20 °C are: PTFE, PVDF, Viton (FPM), FEP, ECTFE/ETFE. These can generally be used in direct contact.

Which materials should be avoided with Perchloric Acid?

Materials rated D (not resistant) for Perchloric Acid are: PP, NBR, Aluminium, Nylon (PA), Acetal (POM), Polycarbonate, PVC Flexible, Polysulfone. These should not be used in contact with Perchloric Acid.

Does temperature affect chemical resistance to Perchloric Acid?

Yes. 6 of 18 tested materials show a worse rating at 50 °C than at 20 °C for Perchloric Acid. Materials affected include: HDPE, PVC Rigid, LDPE, ECTFE/ETFE, Polystyrene, PMP.

Is PTFE safe for Perchloric Acid?

PTFE is rated A for Perchloric Acid at 20 °C. A rating of A means resistant, B means limited resistance, C means partly resistant, and D means not resistant.

Does concentration affect chemical resistance to Perchloric Acid?

Yes. Perchloric Acid is tested at 2 concentrations (20 %, 70 %). Some materials change their rating depending on the concentration.

About this data

The ratings come from the chemical resistance list published by Bürkle GmbH, which compiled them from raw-material manufacturers’ data. They describe laboratory tests on the raw material at 20 °C and 50 °C.

A finished part also sees pressure, mechanical stress, welds and mixtures that a laboratory test does not. Treat the rating as a first filter and test under your own conditions before relying on it.

Chemicals with a similar resistance profile

Same 20 °C rating on the share of materials shown.

Nitric Acid 84 %Hydrogen Fluoride 83 %Sulfuric Acid 74 %Chlorine Water 72 %Bromine 65 %Chloroacetic Acid 65 %