Borosil Conical Glass Beaker Graduated (Borosilicate 3.3 — Laboratory Use)
Pack Sizes Available
Product Description
Technical Specifications
- Brand and Manufacturer: Borosil brand; Borosil Scientific (India); manufacturer of borosilicate 3.3 laboratory glassware for scientific, clinical, educational, and industrial applications; established Indian manufacturer supplying Indian and international laboratory markets; distributed internationally by Foxx Life Sciences and other laboratory supply companies
- Material: Borosilicate 3.3 glass (ISO 3585 composition standard); coefficient of thermal expansion 3.3 x 10-6 K-1; high thermal shock resistance; chemically resistant to most acids, bases, and solvents (exceptions: HF, hot concentrated phosphoric acid, strong hot alkalis); autoclavable at 121°C; service temperature continuous 230°C, single event 490°C
- Design: Low form (Griffin) style — optimal bench stability; pouring spout for controlled liquid transfer without drips; white printed volume graduations (reference only — not calibrated; tolerance ±5% ASTM E960); marking spot (white blank area) for pencil or marker labelling; beaded rim for even heating and pouring
- Available Sizes: 5ml | 10ml | 25ml | 50ml | 100ml | 150ml | 250ml | 400ml | 500ml | 600ml | 800ml | 1000ml | 2000ml | 3000ml | 5000ml — confirmed from Borosil Scientific (borosilscientific.com) and Foxx Life Sciences Borosil distributor listings; 5ml and 10ml not graduated; sizes 500ml and above not covered by ISO 3819 / DIN 12331
- Standards Compliance: IS 2619 (Bureau of Indian Standards — laboratory glassware, beakers); ISO 3819 (International — laboratory glassware, beakers, up to 400ml); DIN 12331 (German — laboratory glassware, beakers, up to 400ml) — confirmed from Foxx Life Sciences Borosil listing; ASTM E960 Type I Class A compatible (material and dimension standards)
- Pack and Applications: Individual units; sets of multiple sizes; bulk case packs for institutional supply; applications: mixing, dissolving, heating, weighing, containing liquids; educational and academic laboratories; clinical and pathology laboratories; pharmaceutical manufacturing QC; chemical and industrial research; food and beverage QA testing
Frequently asked questions
Borosilicate 3.3 glass is a type of glass with a coefficient of thermal expansion of 3.3 x 10-6 K-1 — approximately three times lower than standard soda-lime glass. The '3.3' designation refers to this thermal expansion coefficient and identifies the specific borosilicate composition defined by ISO 3585. The addition of boron trioxide (B2O3) to the silica glass network reduces its thermal expansion, creating a glass that can withstand rapid temperature changes without cracking. In laboratory use, this means borosilicate beakers can be: heated on a hot plate or with a Bunsen burner; taken from the freezer and placed on a warm bench; autoclaved (121°C steam sterilisation); and used repeatedly through heating and cooling cycles over a service life of years. Standard soda-lime glass used for food containers and window panes would crack or shatter under the same thermal conditions. Borosilicate 3.3 is also chemically resistant to most laboratory acids, bases, and solvents (with exceptions including hydrofluoric acid, concentrated phosphoric acid, and strong hot alkalis at high concentration).
Low form (Griffin style) beakers have a wider diameter relative to height — the height-to-diameter ratio is approximately 1.4:1. This shape provides a large, stable base for heating on a hot plate or Bunsen burner tripod, maximum visible liquid surface area for stirring and observation, and greater stability on the bench. They are the most common beaker style for general laboratory use — mixing, dissolving, heating, and containing liquids. Tall form (Berzelius style) beakers have a narrower diameter with greater height — approximately 1.8:1 height-to-diameter ratio. The taller form provides a smaller footprint, which is useful in rack or multi-beaker heating setups, and reduces evaporation surface area, which is valuable when heating liquids for extended periods where evaporation loss is a consideration. Borosil's standard graduated conical beaker range is the low form (Griffin) style, which is the dominant format for teaching laboratories, clinical laboratories, and general scientific use.
Borosil graduated low form glass beakers are available in the following sizes, as confirmed from Borosil Scientific (borosilscientific.com) and Foxx Life Sciences Borosil distributor listings: 5ml, 10ml (not graduated — confirmed from Foxx listing: 5ml and 10ml not graduated), 25ml, 50ml, 100ml, 150ml, 250ml, 400ml, 500ml, 600ml, 800ml, 1000ml, 2000ml, 3000ml, and 5000ml. The 50ml, 100ml, 250ml, 500ml, and 1000ml sizes are the most commonly ordered across academic, clinical, and industrial laboratory settings. Note that 500ml and 1000ml sizes are available from Borosil but are not covered by ISO 3819 or DIN 12331 standards (as confirmed from Foxx Life Sciences Borosil listing annotation); sizes below 500ml comply with both ISO and DIN standards.
Borosil graduated beakers display printed volume graduations as a reference guide for approximate volume estimation during routine laboratory procedures — they are not calibrated volumetric measuring devices. The graduation tolerance on beakers is approximately ±5% (confirmed from ASTM E960 specification referenced in Labvida and ONiLAB product listings), meaning a 250ml graduation marking may actually indicate a volume of 237.5ml to 262.5ml depending on manufacturing variation. Beakers are appropriate for: weighing reagents by mass (not volume); mixing solutions where approximate volume is sufficient; heating and containment; and rough volume estimation during preparation. For precise volumetric measurement (e.g., preparing a 0.1M NaOH solution to exactly 100.0ml), calibrated volumetric flasks with a single graduation mark at the stated volume (tolerance Class A: ±0.1ml for 100ml) must be used. Borosil also manufactures calibrated volumetric flasks, measuring cylinders, and pipettes for precise volumetric applications.
Borosil low form graduated glass beakers comply with IS 2619 (Bureau of Indian Standards — specification for laboratory glassware: beakers), ISO 3819 (International Organization for Standardization — laboratory glassware, beakers), and DIN 12331 (German Institute for Standardization — laboratory glassware, beakers), as confirmed from Foxx Life Sciences Borosil product listing. These three standards define: the external dimensions (height, diameter) for each volume size in the standard series; the graduation marking requirements (scale accuracy, marking permanence, labelling); material requirements (borosilicate glass type and chemical durability class); and dimensional tolerances. Compliance with IS/ISO/DIN certifies that Borosil beakers meet international laboratory glassware quality requirements and are suitable for professional scientific, clinical, and educational laboratory applications. The standards apply to beakers up to 500ml (500ml and above are noted as not covered by ISO and DIN per Foxx listing).
Borosil borosilicate 3.3 glass beakers are compatible with standard laboratory cleaning and sterilisation methods. Routine cleaning: wash with laboratory detergent and warm water, rinse thoroughly with distilled water (to prevent residue from hard water mineral deposits), and allow to air dry or dry in an oven. For chemical contaminants: acid wash (dilute nitric or hydrochloric acid soak) for organic contamination; base soak (sodium hydroxide solution) for some organic residues; chromic acid cleaning solution for extremely tenacious organic contamination (this is deprecated in most modern laboratories due to the chromium toxicity hazard — use alternative oxidising cleaners). Autoclave sterilisation: Borosil borosilicate beakers are autoclavable at 121°C standard cycles (confirmed from ONiLAB product listing which cites '5 minutes at 121°C at 15 psi' as a validated autoclave condition). The beaker must be completely clean before autoclaving. Allow to cool before handling post-autoclave. Do not autoclave beakers that have cracks, chips, or etching damage to the glass surface.
Microlisa HIV Ag & Ab 4th Generation ELISA Test Kit
Blood screening exists in a category of laboratory work where the margin for error is not just professionally unacceptable but medically catastrophic. A false negative in HIV screening does not just fail a test. It compromises patient safety, undermines transfusion protocols, and exposes healthcare systems to risks that nobody wants to calculate. Microlisa HIV Ag & Ab 4th Generation ELISA was engineered to close the detection window that makes early HIV infection so difficult to identify reliably. This is an in-vitro qualitative enzyme immunoassay designed for simultaneous detection of antibodies to HIV-1 (including Group O and subtype C prevalent in India), HIV-2, and HIV-1 p24 antigen in human serum or plasma. The test is intended for screening of blood donors, diagnostic testing of individuals at risk for HIV infection, and clinical evaluation of patients with AIDS-related symptoms. It represents the fourth generation of HIV ELISA technology, which detects both antibodies and antigens simultaneously rather than antibodies alone. The clinical advantage of 4th generation testing is the shortened window period. Traditional antibody-only tests miss early seroconversion cases where HIV-1 p24 antigen is present but antibodies have not yet developed to detectable levels. By detecting p24 antigen during the acute infection phase (typically 2 to 4 weeks post-exposure), this assay identifies infections approximately 1 to 2 weeks earlier than 3rd generation antibody-only tests. That earlier detection matters critically in blood donor screening and post-exposure monitoring. The assay is based on sandwich ELISA methodology. Microtiter wells are pre-coated with HIV envelope proteins (gp41, C-terminus of gp120 for HIV-1, and gp36 for HIV-2) and anti-p24 monoclonal antibodies. When specimens are added, any HIV antibodies or p24 antigen present bind to the coated antigens or antibodies. After washing, horseradish peroxidase (HRPO) conjugated antigens and anti-p24 antibodies are added, forming a sandwich complex. The colorimetric reaction develops proportionally to the amount of HIV antibodies or antigen present, read at 450nm absorbance. The kit uses color-coded reagents to monitor procedural steps, reducing protocol errors during multi-step workflows. Breakaway microwell strips allow testing flexibility from single specimens to full 96-well plate runs. Storage stability is maintained at 2-8°C with a shelf life of 24 months unopened. Total assay time including incubation steps is approximately 120 minutes. Sensitivity and specificity meet international standards for 4th generation HIV screening. Clinical evaluations demonstrate 100% sensitivity in detecting seroconversion panels and p24 antigen standards quantified down to 200 pg/ml. Specificity exceeds 99.5% when tested against large sample populations. The test detects all major HIV-1 subtypes including Group O and subtype C, which are epidemiologically significant in the Indian subcontinent. For distributors supplying blood banks, transfusion centers, diagnostic laboratories, and public health screening programs, Microlisa HIV Ag & Ab represents a clinically validated 4th generation screening platform with predictable reorder cycles. Sara Wellness has been exporting in-vitro diagnostic kits and laboratory reagents from India for 15 years.
Advantage PAN Malaria Card Rapid Diagnostic Test Kit
Malaria diagnosis in endemic regions operates under time pressure that microscopy cannot always accommodate. A patient presenting with fever in a rural health center at midnight does not have the luxury of waiting until morning for a trained microscopist to arrive, prepare slides, and spend twenty minutes examining blood films under oil immersion. That delay can mean the difference between timely artemisinin treatment and cerebral malaria developing overnight. Advantage PAN Malaria Card was designed to deliver species-level diagnosis in settings where microscopy is impractical or unavailable. This is a rapid visual immunoassay for qualitative detection of all four human Plasmodium species (P. falciparum, P. vivax, P. malariae, P. ovale) based on pan-specific plasmodium lactate dehydrogenase (pLDH) antigen in whole blood. The test provides results within 20 minutes using a simple fingerstick blood sample, no laboratory equipment required, making it ideal for point-of-care testing in primary health centers, rural clinics, field hospitals, and outbreak response settings. The assay is based on sandwich immunochromatography using monoclonal antibodies specific to pLDH, an enzyme produced by all Plasmodium species during their erythrocytic life cycle. When infected blood is added to the test device and assay buffer is applied, red blood cells lyse and pLDH antigen (if present) binds to gold-conjugated anti-pLDH antibodies. This complex migrates along the nitrocellulose membrane and is captured by immobilized anti-pLDH antibodies at the test line, producing a visible pink-purple band that confirms malaria infection. The see-through device design allows direct visualization of sample migration and result development, which helps identify invalid tests caused by insufficient sample volume or improper application. This transparency reduces the ambiguity that plagues some lateral flow devices where internal workings are hidden. Sensitivity and specificity have been validated through WHO malaria RDT evaluation programs using panels of wild and cultured parasites. The test detects parasitemia levels above 100 parasites per microliter of blood for both P. falciparum and P. vivax, which is clinically relevant for symptomatic infections requiring treatment. Specificity exceeds 99% when tested against cross-reactive conditions including dengue, leptospirosis, typhoid, and other febrile illnesses common in malaria-endemic areas. Shelf life is 24 to 30 months when stored at 4-30°C, which is critical for stockpiling in tropical climates where cold chain infrastructure is unreliable. The extended temperature stability means the test remains functional even when stored at ambient temperatures in resource-limited settings. Each kit contains individually sealed test devices, buffer vials, blood collection pipettes, and instructions for use. The test requires no special training beyond basic clinical skills and can be performed by nurses, paramedics, or trained community health workers. For distributors supplying national malaria control programs, public health departments, NGO field operations, and private diagnostic laboratories, Advantage PAN Malaria Card represents a WHO-evaluated rapid diagnostic platform with predictable consumption tied to malaria case loads. Sara Wellness has been exporting rapid diagnostic test kits and laboratory reagents from India for 15 years.
Human Serum Coombs Antisera (Antihuman Globulin Reagent)
Blood banking operates on a fundamental requirement that most people never think about until something goes wrong. Every unit of blood transfused must be confirmed compatible with the recipient's immune system. Every pregnant woman screened for antibodies that could harm her unborn child. Every suspected case of hemolytic anemia investigated for antibodies attacking the patient's own red blood cells. None of this happens without Coombs antisera making the invisible antibodies visible. Human Serum Coombs Antisera is the reagent that makes antiglobulin testing possible in blood banks and immunohematology laboratories worldwide. This is antihuman globulin (AHG) reagent used in both direct and indirect antiglobulin tests (Coombs tests) to detect antibodies and complement components bound to red blood cell surfaces or present free in serum. The reagent is produced by immunizing animals (typically rabbits) with human immunoglobulins, which induces production of polyclonal antibodies specific for human IgG antibodies and complement factor C3d. When added to washed red blood cells coated with IgG or complement, the antihuman antibodies bind to the human antibodies and form bridges between adjacent sensitized cells, causing visible agglutination. The direct antiglobulin test (DAT) detects antibodies or complement already bound to red blood cell surfaces in vivo. This test is critical for diagnosing autoimmune hemolytic anemia, investigating hemolytic transfusion reactions, and diagnosing hemolytic disease of the fetus and newborn. The indirect antiglobulin test (IAT) detects free antibodies circulating in serum or plasma. This test is essential for pre-transfusion antibody screening, crossmatching blood units for compatibility, and prenatal antibody screening in pregnant women. Polyspecific Coombs antisera (like the green-colored reagent shown) contains antibodies against both IgG and C3d complement, providing broad-spectrum detection. When the polyspecific reagent produces a positive result, monospecific antisera (anti-IgG alone or anti-C3d alone) are used for follow-up testing to characterize whether red cells are coated with IgG antibodies, complement, or both. This differentiation is clinically important because it helps determine the cause and clinical significance of the positive test. The reagent is typically dyed green using patent blue and tartrazine to allow easy visual identification during laboratory workflows where multiple reagents are used simultaneously. Storage at 2-8°C maintains reagent potency until the expiration date printed on the bottle, typically 18 to 24 months from manufacture. The reagent contains sodium azide (0.1% w/v) as a preservative, which inhibits bacterial growth but requires careful handling and disposal. Each dropper bottle delivers approximately 40 microliters per drop, allowing precise volumetric dosing during testing. The reagent must not be diluted and should not be used if turbid, as turbidity indicates bacterial contamination or protein aggregation that will compromise test performance. For distributors supplying blood banks, hospital transfusion services, reference immunohematology laboratories, and donor screening centers, Coombs antisera represents an essential reagent with consumption directly tied to transfusion volume and prenatal screening programs. Sara Wellness has been exporting immunohematology reagents and blood banking supplies from India for 15 years.