Laboratory supply

Patel Chemhub Private Limited
Laboratory supply · India

Supplied to
specification.

Reagents, testing instruments and laboratory consumables for quality-control, research and industrial testing laboratories. We quote against the grade, the pack size and the standard your method actually calls for — not against a catalogue code.

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Patel Chemhub Private Limited is a trading company. We supply products manufactured by others, and we say so plainly — including which brand a given item comes from, when you ask.

Catalogue

Three lines, one supplier.

Most laboratories buy chemicals from one supplier, instruments from another and consumables from a third, then spend the difference on chasing three sets of paperwork.

Search everything

Chemicals

10 categories

From Extra Pure through AR, HPLC, LC-MS and pharmacopoeial grades — with the grade ladder explained rather than abbreviated.

All 10 chemicals categories →

Instruments

20 categories

Material testing, analytical and microbiology equipment, cited against the current IS, ASTM, BS and EN standards.

All 20 instruments categories →

Labware

8 categories

Borosilicate 3.3 glassware, certified Class A and B volumetric ware, filtration, plasticware and laboratory safety.

Open labware →

Why the detail matters

Three errors this industry keeps reprinting.

Supplier catalogues copy each other. Standards get revised and the old numbers stay in circulation for decades. If your quality manual inherited one of these, an assessor will find it before you do.

See the standards index

  1. Marshall stability and flow

    ASTM D1559ASTM D6927 · ASTM D6926

    ASTM withdrew D1559 in 1998. It still appears on Marshall equipment listings across this industry, twenty-eight years later. D6927 covers the test; D6926 covers specimen preparation.

  2. Soil compaction rammers

    IS 2720 Part 7 ⇄ Part 8Part 7 = light · Part 8 = heavy

    Part 7 is the light compaction test — 2.6 kg rammer, 310 mm drop. Part 8 is heavy — 4.89 kg, 450 mm. Published product titles routinely have these reversed. Check the mass and the drop, not the part number.

  3. Particle size by hydrometer

    ASTM D422IS 2720 Part 4 · ASTM D6913 / D7928

    Withdrawn by ASTM in 2016 and split into two replacements. Still cited on sedimentation apparatus. If your method references D422, it needs updating.

Reference

The grade on the bottle decides whether your result survives an audit.

Most supplier sites print the abbreviation and leave you to guess. Here is what each one actually means, and when it is the right choice.

Full grade reference
AR

Analytical Reagent

The working grade for quantitative analysis. The label carries an assay figure and maximum limits for named impurities, and the batch is covered by a Certificate of Analysis. This is what an accredited laboratory buys for anything that produces a reportable number.

Use when Titrations, gravimetric analysis, standard preparation, any test whose result goes on a report or into a NABL scope.

EXTRA PURE

Extra Pure

The commonest grade in the Indian trade and the practical equivalent of LR. Purity is stated; the impurity table is shorter than AR. Substantially cheaper, and correct for a large share of routine laboratory consumption.

Use when Routine preparation, non-reportable work, bulk consumption.

HPLC

HPLC Grade

Specified on gradient-elution baseline, UV cut-off, residue after evaporation and particulate content — the four things that wreck a chromatogram. Membrane-filtered before filling.

Use when HPLC and UHPLC mobile phases, sample dilution for chromatography.

LC MS

LC-MS Grade

Everything HPLC grade specifies, plus controls on alkali-metal and phthalate content that would otherwise produce adduct ions and raise the baseline. Usually supplied in glass to avoid leachables from plastic.

Use when LC-MS and LC-MS/MS, trace quantitation, proteomics.

IP

Indian Pharmacopoeia

Tested against every test in the IP monograph for that substance, with a Certificate of Analysis referencing it. A pharmacopoeial grade is a regulatory instrument, not a purity claim — it means the material passed a specific, named set of tests.

Use when Pharmaceutical QC, formulation development, anything inspected under Schedule M or supplied into a licensed manufacturing process.

ULTRAPURE

Ultrapure / Trace Metal Grade

Acids and reagents purified so that the reagent blank does not swamp the analyte. Specified in parts per billion, per element, and supplied in containers chosen not to contribute metals back.

Use when ICP-MS, ICP-OES, AAS, trace metal digestion and sample preparation.

Sectors

What a laboratory in your sector actually orders.

Each sector has its own pressure point — pharmacopoeial paperwork, standard revisions, residue-grade solvents, consumable continuity. We supply against that, not against a generic list.

Pharmaceutical & Life Sciences

Pharmacopoeial-grade reagents, qualified instruments and the documentation an inspector expects to see alongside them.

  • Assay and related substances by HPLC
  • Dissolution and content uniformity
  • Loss on drying and water content by Karl Fischer

Construction Materials Testing

Civil engineering testing instruments built to current IS, ASTM and BS standards, with the standard numbers checked rather than copied.

  • Compressive strength of concrete cubes and cylinders
  • Cement consistency, setting time, fineness and soundness
  • CBR, compaction and Atterberg limits on soil

Water & Environmental Testing

Reagents, standards and instruments for drinking water, effluent, ambient air and soil contamination analysis.

  • BOD, COD and total organic carbon
  • Total hardness, alkalinity and chloride by titration
  • Heavy metals by AAS and ICP

Food, Feed & Agriculture

Analytical reagents, pesticide-residue solvents and instrumentation for food safety and agricultural testing laboratories.

  • Crude protein by Kjeldahl
  • Crude fat by Soxhlet extraction
  • Moisture, ash and crude fibre

Education & Research

Teaching laboratory supply at sensible grades and pack sizes, plus research-grade reagents for funded projects.

  • Volumetric and gravimetric analysis practicals
  • Qualitative inorganic and organic analysis
  • Physical chemistry and instrumentation practicals

Industrial Quality Control

In-house QC laboratories in cement, steel, textiles, polymers, paints and petrochemicals.

  • Chemical analysis of cement and clinker
  • Ash, moisture and calorific value of fuels
  • Tensile, hardness and impact testing of metals

Cement Manufacturing

Physical and chemical testing for cement works, grinding units and blending plants — fineness, setting, soundness, strength and oxide analysis.

  • Fineness by Blaine air permeability and by dry sieving
  • Standard consistency and setting time by Vicat apparatus
  • Soundness by Le Chatelier and by autoclave expansion

Ready-Mix Concrete (RMC) Plants

Plant and field laboratory equipment for RMC producers — cube testing, workability, aggregate control and the mix design that has to hold on site.

  • Compressive strength of concrete cubes at 7 and 28 days
  • Slump, compacting factor and flow table for workability
  • Fresh concrete density, temperature and air content

Tile & Ceramics

Testing for tile bodies, glazes and whiteware — water absorption, breaking strength, abrasion, chemical resistance and raw-material control.

  • Water absorption, apparent porosity and bulk density
  • Modulus of rupture and breaking strength
  • Surface abrasion of glazed tiles and deep abrasion of unglazed

Glass & Glass Containers

Testing for flat, container and pharmaceutical glass — thickness and stress, fragmentation, thermal shock and hydrolytic resistance.

  • Hydrolytic resistance of glass grains and of container inner surfaces
  • Surface and edge stress by photoelastic measurement
  • Fragmentation count on thermally toughened glass

Steel & Metallurgical

Mechanical testing, spectrometry and metallography for steel plants, re-rolling mills, foundries and forging shops.

  • Tensile, yield and elongation on machined specimens and full-section bar
  • Charpy V-notch impact at ambient and sub-zero temperature
  • Brinell, Rockwell and Vickers hardness

Paint & Coatings

Testing for decorative, industrial and protective coatings — viscosity, drying, adhesion, gloss, film thickness and accelerated weathering.

  • Viscosity by flow cup, Krebs-Stormer and rotational viscometer
  • Drying time — surface dry, hard dry and through dry
  • Adhesion by cross-cut and by pull-off

Petroleum, Fuels & Lubricants

Testing for refineries, blending plants, lubricant manufacturers and fuel depots — flash, viscosity, distillation, sulphur and contamination.

  • Flash point by Abel, Pensky-Martens and Cleveland open cup
  • Kinematic viscosity at 40 °C and 100 °C, and viscosity index
  • Density and API gravity by hydrometer and by digital density meter

Plastics, Fibre & Fibreglass

Testing for polymer compounders, film and pipe extruders, moulders and GRP fabricators — melt flow, tensile, impact, thermal and glass content.

  • Melt flow index at stated temperature and load
  • Tensile strength, elongation and modulus
  • Flexural strength and modulus

Rubber & Elastomers

Testing for tyre, hose, belt, moulded-goods and latex manufacturers — cure characteristics, tensile, hardness, ageing and abrasion.

  • Cure characteristics by moving die rheometer — ts2, t90 and torque
  • Mooney viscosity and Mooney scorch
  • Tensile strength, modulus and elongation at break

Geotextiles & Geosynthetics

Index and performance testing for woven and non-woven geotextiles, geogrids, geomembranes and geocomposites in road, landfill and drainage works.

  • Wide-width tensile strength and elongation
  • Grab tensile strength
  • CBR static puncture resistance

Textiles & Apparel

Fibre, yarn, fabric and garment testing for spinning mills, processing houses and export units — strength, colour fastness, shrinkage and restricted substances.

  • Tensile and tear strength of woven fabric
  • Bursting strength of knitted fabric
  • Colour fastness to washing, rubbing, perspiration and light

Packaging — Paper, Board & Corrugated

Testing for paper mills, corrugators, box plants and packaging users — bursting strength, crush resistance, Cobb, grammage and transit performance.

  • Bursting strength of paper and of corrugated board
  • Edge crush, flat crush, ring crush and Concora crush
  • Box compression and stacking

Dairy Processing

Reagents, glassware and instruments for milk reception, process control and finished-product testing at dairies and chilling centres.

  • Fat by Gerber, and solids-not-fat by lactometer
  • Titratable acidity and pH
  • Clot-on-boiling and alcohol stability
Frequently supplied

A sample of what moves.

All chemicals

Send us the method, not just the product code.

Give us the test you are running, the standard it works to and the volume you consume, and we will quote the grade and pack size that fit — including telling you where a cheaper grade would do the same job.

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