Methyl O-(4-amino-3,5-dichloro-6-fluoropyridin-2-yloxy)acetate

Melting point / freezing point

Administrative data

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

26 April 1991-25 November 1991

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP guideline study

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1991

Report date:

1991

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Test guideline 3

Qualifier:

according to guideline

Guideline:

other: EPA 63.5

GLP compliance:

yes

Type of method:

capillary method

Test material

Test material information

Constituent 1

Reference substance name:

Methyl O-(4-amino-3,5-dichloro-6-fluoropyridin-2-yloxy)acetate

EC Number:

407-550-4

EC Name:

Methyl O-(4-amino-3,5-dichloro-6-fluoropyridin-2-yloxy)acetate

Cas Number:

69184-17-4

Molecular formula:

Hill formula: C8 H7 Cl2 F N2 O3 CAS formula: C8 H7 Cl2 F N2 O3

IUPAC Name:

methyl 2-[(4-amino-3,5-dichloro-6-fluoropyridin-2-yl)oxy]acetate

Details on test material:

- Name of test material (as cited in study report): Fluroxypyr methyl ester
- Physical state: black crystalline powder
- Analytical purity: 90.8%
- Purity test date: 28.08.1990
- Lot/batch No.: C-3B
- Expiration date of the lot/batch: August 1992
- Storage condition of test material: at room temperature in the dark

Results and discussion

Melting / freezing point

Melting / freezing pt.:

>= 118.3 - <= 124.3 °C

Decomposition:

no

Sublimation:

no

Any other information on results incl. tables

The results of duplicate melting point determinations on pulverised samples of the substance (technical) were as follows:

Melting stage	Temperature (°C)
	Run I	Run II
A	117.8	52.30
B	119.8	80.81
C	122.8	114.58
D	123.8	147.57
E	124.8	210.75

The melting stages A to E are defined as follows:

Stage A (wet point): fine droplets adhere uniformly on the inside wall of the capillary tube.

Stage B (shrinkage point): a clearance appears between the sample and the inside wall due to shrinkage of the melt.

Stage C (collapse point): the shrunken sample begins to collapse downwards and liquifies.

Stage D (liquifying point): a complete meniscus is formed at the surface, but an appreciable amount of the sample remains solid.

Stage E (final stage of melting): there are no solid particles.

Thus the melting range of the substance (technical) is:

118.3-124.3 °C (391.3 -397.3 K) - mean of 117.8 -124.8 °C and 118.8 -123.8 °C.