CAS number

CAS 55-38-9 Fenthion

CAS 55-38-9 · EC 200-231-9 · Index No 015-048-00-8

Where CAS 55-38-9 appears: every table entry that prints it among its identifiers, in the newest version of each act this record holds, and every recorded change to those entries. Many entries name a group of substances and print no number, so absence here is not absence from the law. Not legal advice.

Where it appears now

CLP Annex VI section 3, Index No 015-048-00-8

Last changed in the version in force 1 December 2019, by Regulation (EU) 2018/669 and 2 others, the acts that change names · Annex VI on this site

Annex VI section 3, table 1
Index No	Chemical name	EC No	CAS No	Classification		Labelling			Specific Conc. Limits, M-factors and ATEs	Notes
Index No	Chemical name	EC No	CAS No	Hazard Class and Category Code(s)	Hazard statement Code(s)	Pictogram, Signal Word Code(s)	Hazard statement Code(s)	Suppl. Hazard statement Code(s)	Specific Conc. Limits, M-factors and ATEs	Notes
015-048-00-8	fenthion (ISO); O, O-dimethyl-O-(4-methylthion-m-tolyl) phosphorothioate	200-231-9	55-38-9	Muta. 2 Acute Tox. 3 * Acute Tox. 4 * Acute Tox. 4 * STOT RE 1 Aquatic Acute 1 Aquatic Chronic 1	H341 H331 H312 H302 H372** H400 H410	GHS06 GHS08 GHS09 Dgr	H341 H331 H312 H302 H372** H410		M=100

CLP Annex VI section 3, table 2, Index No 015-048-00-8

Last changed in the version in force 1 December 2010, by Regulation (EC) No 790/2009, the act that change names · Annex VI on this site

Annex VI section 3, table 2
Index No	International Chemical Identification	EC No	CAS No	Classification	Labelling	Concentration Limits	Notes
015-048-00-8	fenthion (ISO); O,O-dimethyl-O-(4-methylthion-m-tolyl) phosphorothioate	200-231-9	55-38-9	Muta. Cat. 3; R68 T; R23-48/25 Xn; R21/22 N; R50-53	T; N R: 21/22-23-48/25-68-50/53 S: (1/2-)36/37-45-60-61	N; R50-53: C ≥ 0,25 % N; R51-53: 0,025 % ≤ C < 0,25 % R52-53: 0,0025 % ≤ C < 0,025 %

Cosmetics Regulation Annex II, Reference number 1072

No change to this entry since the first version the record holds, in force 11 July 2013. · Annex II on this site

Annex II, table 1
Reference number	Substance identification
Reference number	Chemical name/INN	CAS number	EC number
a	b	c	d
1072	Fenthion	55-38-9	200-231-9

PIC Regulation Annex I, the entry for Fenthion

Last changed in the version in force 1 July 2022, by Regulation (EU) 2022/643, the act that change names · Annex I on this site

Annex I, table 1
Chemical	CAS No	EC No	CN code	Subcategory	Use limitation	Countries for which no notification is required
Fenthion	55-38-9	200-231-9	ex29309098	p(1)	sr

PIC Regulation Annex I, table 2, the entry for Fenthion

Last changed in the version in force 1 July 2022, by Regulation (EU) 2022/643, the act that change names · Annex I on this site

Annex I, table 2
Chemical	CAS No	EC No	CN code	Category	Use limitation
Fenthion	55-38-9	200-231-9	ex29309098	p	sr

PIC Regulation Annex I, table 3, the entry for Fenthion (ultra-low-volume formulations at or above 640 g…

Last changed in the version in force 1 October 2026, by Regulation (EU) 2026/1278, the act that change names · Annex I on this site

Annex I, table 3
Chemical	Relevant CAS number(s)	HS code Pure substance	HS code Mixtures containing substance	Category
Fenthion (ultra-low-volume formulations at or above 640 g active ingredient/L)	55-38-9	2930.90	ex 3808.91	Severely hazardous pesticide formulation

Look up a number

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Its history

1 October 2026 · added · PIC Regulation Annex I, table 3, the entry for Fenthion (ultra-low-volume formulations at or above 640 g…

Recorded in the version in force 1 October 2026, by Regulation (EU) 2026/1278, the act that change names. The change on its version page

Added entries, Annex I, table 3
Identifiers	Chemical	Relevant CAS number(s)	HS code Pure substance	HS code Mixtures containing substance	Category
Fenthion (ultra-low-volume formulations at or above 640 g active ingredient/L)CAS 55-38-9	Fenthion (ultra-low-volume formulations at or above 640 g active ingredient/L)	55-38-9	2930.90	ex 3808.91	Severely hazardous pesticide formulation

1 July 2022 · amended · PIC Regulation Annex I, the entry for Fenthion

Recorded in the version in force 1 July 2022, by Regulation (EU) 2022/643, the act that change names. The change on its version page

Amended entries, Annex I, table 1
Identifiers	Version	Chemical	CAS No	EC No	CN code	Subcategory	Use limitation	Countries for which no notification is required
FenthionCAS 55-38-9EC 200-231-9	Before	Fenthion	55-38-9	200-231-9	~~29309085~~	p(1)	sr
FenthionCAS 55-38-9EC 200-231-9	After	Fenthion	55-38-9	200-231-9	ex29309098	p(1)	sr

1 July 2022 · amended · PIC Regulation Annex I, table 2, the entry for Fenthion

Recorded in the version in force 1 July 2022, by Regulation (EU) 2022/643, the act that change names. The change on its version page

Amended entries, Annex I, table 2
Identifiers	Version	Chemical	CAS No	EC No	CN code	Category	Use limitation
FenthionCAS 55-38-9EC 200-231-9	Before	Fenthion	55-38-9	200-231-9	~~29309085~~	p	sr
FenthionCAS 55-38-9EC 200-231-9	After	Fenthion	55-38-9	200-231-9	ex29309098	p	sr

1 December 2019 · amended · CLP Annex VI section 3, Index No 015-048-00-8

Recorded in the version in force 1 December 2019, by Regulation (EU) 2018/669 and 2 others, the acts that change names. Only spacing, dash forms or accents differ. The change on its version page

Amended entries, Annex VI section 3, table 1
Identifiers	Version	Index No	Chemical name	EC No	CAS No	Classification		Labelling			Specific Conc. Limits, M-factors	Notes
Identifiers	Version	Index No	Chemical name	EC No	CAS No	Hazard Class and Category Code(s)	Hazard statement Code(s)	Pictogram, Signal Word Code(s)	Hazard statement Code(s)	Suppl. Hazard statement Code(s)	Specific Conc. Limits, M-factors	Notes
Index No 015-048-00-8CAS 55-38-9EC 200-231-9	Before	015-048-00-8	fenthion (ISO); ~~O,O-dimethyl-O-(4-methylthion-m-tolyl)~~ phosphorothioate	200-231-9	55-38-9	Muta. 2 Acute Tox. 3 * Acute Tox. 4 * Acute Tox. 4 * STOT RE 1 Aquatic Acute 1 Aquatic Chronic 1	H341 H331 H312 H302 H372** H400 H410	GHS06 GHS08 GHS09 Dgr	H341 H331 H312 H302 H372** H410		M=100
Index No 015-048-00-8CAS 55-38-9EC 200-231-9	After	015-048-00-8	fenthion (ISO); O, O-dimethyl-O-(4-methylthion-m-tolyl) phosphorothioate	200-231-9	55-38-9	Muta. 2 Acute Tox. 3 * Acute Tox. 4 * Acute Tox. 4 * STOT RE 1 Aquatic Acute 1 Aquatic Chronic 1	H341 H331 H312 H302 H372** H400 H410	GHS06 GHS08 GHS09 Dgr	H341 H331 H312 H302 H372** H410		M=100

1 December 2010 · amended · CLP Annex VI section 3, Index No 015-048-00-8

Recorded in the version in force 1 December 2010, by Regulation (EC) No 790/2009, the act that change names. The change on its version page

Amended entries, Annex VI section 3, table 1
Identifiers	Version	Index No	International Chemical Identification	EC No	CAS No	Classification		Labelling			Specific Conc. Limits, M-factors
Identifiers	Version	Index No	International Chemical Identification	EC No	CAS No	Hazard Class and Category Code(s)	Hazard statement Code(s)	Pictogram, Signal Word Code(s)	Hazard statement Code(s)	Suppl. Hazard statement Code(s)
Index No 015-048-00-8CAS 55-38-9EC 200-231-9	Before	015-048-00-8	fenthion (ISO); O,O-dimethyl-O-(4-methylthion-m-tolyl) phosphorothioate	200-231-9	55-38-9	Muta. 2 Acute Tox. 3 * ~~STOT RE 1~~ Acute Tox. 4 * Acute Tox. 4 * Aquatic Acute 1 Aquatic Chronic 1	H341 H331 H372 ** H312 H302 H400 H410	GHS06 GHS08 GHS09 Dgr	H341 H331 H372 ** H312 H302 H410
Index No 015-048-00-8CAS 55-38-9EC 200-231-9	After	015-048-00-8	fenthion (ISO); O,O-dimethyl-O-(4-methylthion-m-tolyl) phosphorothioate	200-231-9	55-38-9	Muta. 2 Acute Tox. 3 * Acute Tox. 4 * Acute Tox. 4 * STOT RE 1 Aquatic Acute 1 Aquatic Chronic 1	H341 H331 H312 H302 H372** H400 H410	GHS06 GHS08 GHS09 Dgr	H341 H331 H312 H302 H372** H410		M=100

1 December 2010 · amended · CLP Annex VI section 3, table 2, Index No 015-048-00-8

Recorded in the version in force 1 December 2010, by Regulation (EC) No 790/2009, the act that change names. The change on its version page

Amended entries, Annex VI section 3, table 2
Identifiers	Version	Index No	International Chemical Identification	EC No	CAS No	Classification	Labelling	Concentration Limits	Notes
Index No 015-048-00-8CAS 55-38-9EC 200-231-9	Before	015-048-00-8	fenthion (ISO); O,O-dimethyl-O-(4-methylthion-m-tolyl) phosphorothioate	200-231-9	55-38-9	Muta. Cat. 3; R68 T; R23-48/25 Xn; R21/22 N; R50-53	T; N R: ~~21/22-23-48/25-50/53-68~~ S: (1/2-)36/37-45-60-61
Index No 015-048-00-8CAS 55-38-9EC 200-231-9	After	015-048-00-8	fenthion (ISO); O,O-dimethyl-O-(4-methylthion-m-tolyl) phosphorothioate	200-231-9	55-38-9	Muta. Cat. 3; R68 T; R23-48/25 Xn; R21/22 N; R50-53	T; N R: 21/22-23-48/25-68-50/53 S: (1/2-)36/37-45-60-61	N; R50-53: C ≥ 0,25 % N; R51-53: 0,025 % ≤ C < 0,25 % R52-53: 0,0025 % ≤ C < 0,025 %

Sources

CLP: every version the record holds; rows read from EUR-Lex consolidated version 02008R1272-20270101, in force 1 January 2027 (external, EUR-Lex)
Cosmetics Regulation: every version the record holds; rows read from EUR-Lex consolidated version 02009R1223-20260518, in force 18 May 2026 (external, EUR-Lex)
PIC Regulation: every version the record holds; rows read from EUR-Lex consolidated version 02012R0649-20261001, in force 1 October 2026 (external, EUR-Lex)

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