Technical Notes

Thrace-LINQ TECH NOTE #21
GTF 550T/1000T/1500T HIGH STRENGTH GEOTEXTILES
CHEMICAL RESISTANCE OF POLYESTER FILAMENT YARNS

Acids

Compound	pH	%¹	Compound	pH	%¹
Acetic acid, 15%	2.0	100	Lactic Acid conc.	0.7	100
Acetic acid conc.	0.1	100	Maleic acid, 25%	1.3	100
Acetic anhydride	-	100	Nitric acid, 15%	<0.1	100
Benzoic acid*	-	100	Nitric acid, 20%	<0.1	69
Boric acid§	3.5	100	Nitric acid, ³ 30%	<0.1	SD**
Chlorosulfonic acid	-	SD**	Oxalic acid*	-	100
Chromic acid*	-	83	Phosphoric acid, 20%	0.6	92
Citric acid, 15%	1.5	100	Phosphoric acid, 50%	0.1	95
Citric acid, 25%	1.2	100	Phosphoric acid, 85%	<0.1	100
Formic acid conc.	<0.1	100	Stearic acid§	-	100
Hydrochloric acid, 15%	<0.1	100	Sulfuric acid, 15%	<0.1	100
Hydrochloric acid, ³ 20%	<0.1	SD**	Sulfuric acid, 38% battery acid	<0.1	100
Hydrofluoric acid, 10%	-	93	Sulfuric acid, 50%	0.1	92
Hydrofluoric acid, 20%	-	86	Sulfuric acid, 70%	0.1	72
Hydrofluoric acid, 38-40%	-	SD**	Sulfuric acid, ³ 90%	£ 0.1	SD**

¹ % Strength retention of Trevira Polyester Filament yarns after one year exposure at ambient conditions.
Values obtained from Technical Fibers Group Hoechst Celanese Corporation
§ Saturated aqueous solution
** Severely degraded

Alkalis

Compound	pH	%¹	Compound	pH	%¹
Ammonium hydroxide	8-10	88	Potassium hydroxide, 0.1	12.5	90
Ammonium hydroxide, ³ 2%	³ 11.4	SD*	Potassium hydroxide, ³ 2%	³ 13.4	SD*
Calcium hydroxide, ³ 15%	12.4	SD*	Sodium hydroxide, 0.1%	12.1	94
Diethylamine	3.5	SD*	Sodium hydroxide, ³ 2%	³ 12.8	SD*
Hydrazine, 2%	10.6	76	Triethanolamine	13.3	66
Hydrazine, 5%	10.8	SD*	Urea	10.4	91

¹ % Strength retention of Trevira Polyester Filament yarns after one year exposure at ambient conditions
Values obtained from Technical Fibers Group Hoechst Celanese Corporation
* Severely degraded
Inorganic Chemicals

Compound	pH	%¹	Compound	pH	%¹
Aluminum sulfate	2.9	100	Potassium nitrate	8.8	100
Ammonium chloride	5.1	100	Potassium perchlorate	9.9	100
Ammonium nitrate*	4.8	100	Potassium permanganate	9.7	100
Ammonium sulfate	4.6	100	Potassium sulfate	7.5	100
Calcium chloride*	7.2	100	Silver nitrate, 25%	4.6	100
Calcium nitrate*	3.9	100	Sodium ammonium hydrogen sulfate	8.2	100
Copper sulfate	3.5	100	Sodium bicarbonate	7.8	100
Ferric chloride	0.8	100	Sodium carbonate	11.2	100
Ferrous sulfate	3.0	100	Sodium chlorate	7.4	100
Magnesium chloride	4.0	100	Sodium chloride	7.4	100
Magnesium sulfate	6.6	100	Sodium nitrate	8.3	100
Nickel sulfate*	4.5	100	Sodium perchlorate*	5.8	100
Potassium bichromate	3.7	100	Sodium sulfate	5.4	100
Potassium bromide	6.5	100	Sodium tetraborate	9.3	100
Potassium carbonate	13.1	100	Sodium thiosulfate	5.4	100
Potassium chlorate	6.9	100	Zinc chloride	2.4	100
Potassium chloride	8.0	100	Zinc sulfate	4.0	100
Potassium chromate	9.4	100

Solvents

Compound	%¹	Compound	%¹	Compound	%¹
Acetone	100	Dimethyl formamide	100	Nitrobenzene	100
Amyl acetate	100	Dimethyl sulfoxide	100	Phenol § §	100
Aniline	100	Epichlorhydrin	100	m-Phenylene diamine*	100
Benzaldehyde	100	Ethanol	100	2-Phenylethylalcohol	100
Benzcatechin*	100	Ether	100	Pyridine	100
Benzene	100	Ethyl acetate	100	Phloroglucinol§	100
Benzoic acid amide§	100	Formaldehyde, 30%	100	Pyrogallol	100
Benzyl alcohol	SD**	Formamide	100	Resorcinol*	100
Butanol	100	Glycol	100	Styrene	100
Butyl acetate	100	n-Hexylamine	SD**	Tetrachloroethane	92
Carbon tetrachloride	100	Hydroquinone§	100	Toluene	100
Chloramine	98	Isopropyl alcohol	100	Trichloroethylene	100
Chloroform	100	Methyl acetate	100	Trimethylamine	SD**
m-Cresol	100	Methyl alcohol	100	Turpentine	100
Cyclohexanone	100	Methylene chloride	100	White spirit	100
Cyclohexylamine	SD**	Methyl ethyl ketone	100	Xylene	100
Diacetone alcohol	100	Mineral oil	100